Статті в журналах: "Stimulations proprioceptives"

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Boutan, M., and R. Baladron. "Stimulations vibratoires proprioceptives et rééducation de la main." Chirurgie de la Main 32, no. 6 (December 2013): 489–90. http://dx.doi.org/10.1016/j.main.2013.10.174.

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Dankerl, Peter, Andrea Kerstin Keller, Lothar Häberle, Thomas Stumptner, Gregor Pfaff, Michael Uder, and Raimund Forst. "Effects on posture by different neuromuscular afferent stimulations and proprioceptive insoles: Rasterstereographic evaluation." Prosthetics and Orthotics International 40, no. 3 (October 31, 2014): 369–76. http://dx.doi.org/10.1177/0309364614554031.

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Background: Proprioceptive neuromuscular stimulating insoles are increasingly applied in treating functional complaints, chronic pain, foot disorders and so on. Objectives: To evaluate rasterstereography as a tool in objectifying postural changes resulting from neuromuscular afferent stimulation and proprioceptive neuromuscular stimulating insoles and to compare the respective effects on posture. Study design: This is a prospective experimental study. Methods: A total of 27 healthy volunteers were consecutively exposed to six different varying intense neuromuscular afferent stimulating test conditions at three different times. One test condition featured proprioceptive neuromuscular stimulating insoles. In each test condition, a sequence of 12 rasterstereographic recordings of back shape was documented. Changes between six different test conditions and over time for 14 posture characterising parameters were investigated, for example, trunk inclination, pelvic torsion, lateral deviation of the spine’s amplitude or sagittal spinal curve. Results: Standard deviation of our rasterstereographic measurements (±2.67 mm) was better than in most comparable reference values. Different neuromuscular stimuli were found to provoke significant changes to various posture parameters, including trunk inclination, pelvic torsion and so on ( each p < 0.001, F-tests). Proprioceptive neuromuscular stimulating insoles induced significant changes for parameter lateral deviation of the spine’s amplitude (p = 0.03). Conclusion: Neuromuscular afferent stimulation and proprioceptive neuromuscular stimulating insoles induce postural changes, which can be detected reliably by rasterstereography. Clinical relevance We demonstrated that rasterstereography – a radiation-free imaging modality – enables visualisation and documentation of subtle postural changes induced by varying intense neuromuscular afferent stimulation and the application of proprioceptive neuromuscular stimulating insoles.

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Grabherr, Luzia, Leslie N. Russek, Valeria Bellan, Mohammad Shohag, Danny Camfferman, and G. Lorimer Moseley. "The disappearing hand: vestibular stimulation does not improve hand localisation." PeerJ 7 (July 26, 2019): e7201. http://dx.doi.org/10.7717/peerj.7201.

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Background Bodily self-consciousness depends on the coherent integration of sensory information. In addition to visual and somatosensory information processing, vestibular contributions have been proposed and investigated. Vestibular information seems especially important for self-location, but remains difficult to study. Methods This randomised controlled experiment used the MIRAGE multisensory illusion box to induce a conflict between the visually- and proprioceptively-encoded position of one hand. Over time, the perceived location of the hand slowly shifts, due to the fact that proprioceptive input is progressively weighted more heavily than the visual input. We hypothesised that left cold caloric vestibular stimulation (CVS) augments this shift in hand localisation. Results The results from 24 healthy participants do not support our hypothesis: CVS had no effect on the estimations with which the perceived position of the hand shifted from the visually- to the proprioceptively-encoded position. Participants were more likely to report that their hand was ‘no longer there’ after CVS. Taken together, neither the physical nor the subjective data provide evidence for vestibular enhanced self-location.

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Aonuma, H., P. L. Newland, and T. Nagayama. "Processing of proprioceptive signals by ascending interneurones in the terminal abdominal ganglion of the crayfish." Journal of Experimental Biology 202, no. 21 (November 1, 1999): 2975–84. http://dx.doi.org/10.1242/jeb.202.21.2975.

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Intersegmental interneurones are crucial for the appropriate coordination of the activity of local circuits located in different body segments. We have analysed the synaptic inputs to ascending intersegmental interneurones from a proprioceptor in the tailfan of the crayfish. Twenty identified interneurones responded during stimulation of the exopodite-endopodite chordotonal organ. Of these 20 interneurones, three were excited phaso-tonically, nine were excited phasically and eight were inhibited. All received convergent exteroceptive inputs from water-motion- or touch-sensitive hairs on the uropods. The effects of simultaneous exteroceptive and proprioceptive stimulation depended upon the identity of an interneurone. For interneurones that were inhibited by proprioceptive stimulation, suprathreshold exteroceptive responses were reduced to a subthreshold level by simultaneous proprioceptive stimulation. In contrast, for interneurones that were excited by proprioceptive stimulation, the simultaneous application of subthreshold proprioceptive and exteroceptive stimulation elicited action potentials. Two of the interneurones that receive proprioceptive input (NE-1 and RC-8) are known to be presynaptic to giant interneurones that mediate and coordinate the tail-flip. Many of the other interneurones that receive proprioceptive inputs in the tailfan are known to excite abdominal extensor motor neurones. Thus, proprioceptive input to these intersegmental interneurones could serve two roles: first, to extend the abdomen during postural movements or prior to escape and, second, to drive the tail-flip escape response.

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Ito, Yohei, Keitaro Kawai, Yoshifumi Morita, Tadashi Ito, Kazunori Yamazaki, Yoshiji Kato, and Yoshihito Sakai. "Evaluation Method of Immediate Effect of Local Vibratory Stimulation on Proprioceptive Control Strategy: A Pilot Study." Electronics 10, no. 3 (February 1, 2021): 341. http://dx.doi.org/10.3390/electronics10030341.

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Postural instability owing to poor proprioception is considered a main cause of low back pain and falls. However, the effect of local vibratory stimulation on a poor proprioceptor on proprioceptive control strategy has yet to be evaluated. Therefore, in this study, we proposed an evaluation method of the immediate effect on proprioceptive control strategies by applying local vibratory stimulation to the poor proprioceptor. First, using our device, we determined the poor proprioceptors in each of six elderly patients with non-specific low back pain. Furthermore, we applied local vibratory stimulation to the poor proprioceptor. Finally, we compared the proprioceptive control strategy before and after applying local vibratory stimulation. As a result, the proprioceptive control strategy improved for three patients with impaired muscle spindles that responded to a higher frequency (p < 0.05). Thus, the impaired proprioceptive control strategy caused by a decline in the muscle spindle responding to a higher frequency might be improved by local vibratory stimulation. Furthermore, it was shown that our developed device and protocol might be used to evaluate proprioceptive control strategies within multiple frequency ranges, as well as activate a poor proprioceptor based on diagnosis and improve the proprioceptive control strategies.

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Mozheiko, E. Yu, S. V. Prokopenko, Ya V. Yasinskaya, Yu O. Eremina, Yu Yu Piskareva, and Ya O. Revtovich. "Proprioceptive Stimulation of the Articulatory Muscles for Restoration of Speech and Swallowing." Doctor.Ru 19, no. 9 (2020): 39–44. http://dx.doi.org/10.31550/1727-2378-2020-19-9-39-44.

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Objective of the Paper: To assess the possibility of supplementing standard speech therapy protocols for dysarthria patients in the acute period of ischemic stroke, with techniques for stimulating the afferent nerves of the mouth and articulatory organs via a proprietary training mask designed to improve proprioception. Key Points: The paper describes a clinical case of using the training mask. Repeated speech evaluations and changes in scores on scales for assessing the severity of speech problems and dysarthria showed that stimulation of the proprioceptive afferents in the mouth and articulatory organs improved mimetic muscle function and speech articulation, contributed to normalizing muscle tone in the articulatory muscles, and reduced speech hesitation. Conclusion: The clinical case described in the paper demonstrates the positive effects of a training mask designed for proprioceptive stimulation of the articulatory muscles in patients with acute ischemic stroke. These results will be of interest to neurologists, speech therapists, and specialists in neurorehabilitation. Keywords: dysarthria, pseudobulbar disorders, extrapyramidal disorders, training mask, ischemic stroke.

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Seizova-Cajic, T., and B. W. L. Sachtler. "Visual aftereffects of proprioceptive stimulation not due to proprioceptive adaptation." Journal of Vision 6, no. 6 (March 18, 2010): 190. http://dx.doi.org/10.1167/6.6.190.

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Jöbges, E. M., J. Elek, J. D. Rollnik, R. Dengler, and W. Wolf. "Vibratory proprioceptive stimulation affects Parkinsonian tremor." Parkinsonism & Related Disorders 8, no. 3 (January 2002): 171–76. http://dx.doi.org/10.1016/s1353-8020(01)00016-5.

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Marotta, Nicola, Lucrezia Moggio, Dario Calafiore, Emanuele Prestifilippo, Riccardo Spanó, Anna Tasselli, Vera Drago Ferrante, Marco Invernizzi, Alessandro de Sire, and Antonio Ammendolia. "Efficacy of Proprioceptive Training on Plantar Pressure and Jump Performance in Volleyball Players: A Proof-of-Principle Study." Sensors 23, no. 4 (February 8, 2023): 1906. http://dx.doi.org/10.3390/s23041906.

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Volleyball players are often subject to micro-traumatisms of the heel fat pad and ankle injuries. Recently, mat-based proprioceptive training has assumed a key role in recovery from these disorders. Therefore, this proof-of-principle study aimed to assess the efficacy of proprioceptive mat training on plantar pressures and athletic performance in volleyball players. The participants included adult semi-professional volleyball players allocated into two groups: an experimental group, with mat-based proprioceptive and balance training, and a control group, with a sham protocol. For the outcome, we evaluated the barefoot plantar pressure, performing an analysis on a baropodometric resistive platform. The countermovement jump and squat jump were measured using an inertial measurement unit. Nineteen subjects were included in the two groups: the active proprioceptive group (n = 10) or the control group (n = 9). The results show a more uniform redistribution of loads with pressure hindfoot relief in the experimental group compared to the control group (p = 0.021, RBC = 0.67). Moreover, we observed a significant increase in peak landing force and high concentric power development in the experimental group compared to the controls. Focused proprioceptive management provided hindfoot load attenuation by stimulating higher peaks of concentric force in the experimental group compared to the sham group. Even though the study included a small sample, the results obtained in this proof-of-principle study suggest a positive role of proprioceptive stimulation in the inter-seasonal scenario for volleyball players to improve their jump performance and reduce the micro-traumatisms of the heel fat pad and the ankle injury rate. However, further studies performed on larger samples are needed to confirm these preliminary results.

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Gellman, R., A. R. Gibson, and J. C. Houk. "Inferior olivary neurons in the awake cat: detection of contact and passive body displacement." Journal of Neurophysiology 54, no. 1 (July 1, 1985): 40–60. http://dx.doi.org/10.1152/jn.1985.54.1.40.

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We have recorded from 306 neurons in the inferior olive of six alert cats. Most of the cats were trained to perform a simple task with the forelimb. We observed the neural responses to a wide variety of cutaneous and proprioceptive stimuli, as well as responses during spontaneous and learned active movements. Neurons responsive to somatosensory stimulation were found in all parts of the inferior olive, and they were roughly evenly divided between those responsive to cutaneous stimulation and those responsive to proprioceptive stimulation. In the dorsal accessory olive all neurons were responsive to somatosensory stimulation. In the medial accessory nucleus 88% and in the principal olive 74% of cells were responsive to somatosensory stimulation. Cells responsive to cutaneous stimulation usually had small receptive fields, commonly on the paw. These cells had low-threshold responses to one or more forms of cutaneous stimulation and typically fired one spike at the onset of the stimulus on 80% or more of stimulus applications. Cells responsive to proprioceptive stimulation most commonly responded to passive displacements of a limb. These cells were often very sensitive, responding to linear displacements of less than 1 cm in one specific direction. No cells in our sample responded reliably during active movement by the animal. Only 21% of cells responding to passive proprioceptive stimulation showed any modulation during active movement, and the modulation was weak. Likewise, cells responsive to cutaneous stimulation generally failed to respond when a similar stimulus was produced by an active movement by the animal. Exceptions to this were stimuli produced during exploratory movements or when the receptive field unexpectedly made contact with an object during active movement. Electrical stimulation applied in the inferior olive failed to evoke movements or to modify ongoing movement. Our results are consistent with the hypothesis that inferior olivary neurons function as somatic event detectors responding particularly reliably to unexpected stimuli.

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Bertrand-Charette, Michaël, Miorie Le Quang, Jean-Sébastien Roy, and Laurent J. Bouyer. "Alteration of ankle proprioceptive threshold during gait in the presence of acute experimental pain." PLOS ONE 17, no. 1 (January 25, 2022): e0263161. http://dx.doi.org/10.1371/journal.pone.0263161.

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Objective Human gait requires complex somatosensory processing of various inputs such as proprioception. Proprioception can be altered in the presence of pain. This has been shown mostly during controlled tasks, thereby limiting the influence of external perturbations. While controlling the environment is sometimes warranted, it limits the ecological validity of the data. Using robotic orthoses to apply perturbations during movements seems a promising tool to functionally assess proprioception, where the complex somatosensory processing required in real-life situations is at play. The main objective of this study was to compare the proprioceptive threshold of healthy participants during gait in the presence and absence of an acute experimental pain. Methods 36 healthy participants walked on a treadmill while wearing a robotized ankle–foot orthosis (rAFO) around their right ankle. The rAFO applied torque perturbations of graded magnitudes during the swing phase of gait. Participants had to report the presence/absence of such perturbations, as a measure of proprioceptive threshold. Following initial assessment, they were randomly assigned to one of three experimental groups: Control (no stimulation), Painless (non-nociceptive stimulation) and Painful (nociceptive stimulation). Electrodes placed on the right lateral malleolus delivered an electrical stimulation during the second assessment for Painless and Painful groups. A Kruskal-Wallis was used to compare the percentage of change of the three groups between the two assessments. Results A 31.80±32.94% increase in proprioceptive threshold, representing an increase of 1.3±1.2 Nm in the detection threshold, was observed for the Painful group only (p<0.005), with an effect size of 1.6. Conclusion Findings show that the presence of pain at the ankle can alter participants’ proprioceptive threshold during gait. Clinical assessment of proprioception should therefore carefully consider the presence of pain when evaluating a patient’s performance using clinical proprioceptive test and consider the negative effect of pain on proprioceptive threshold for test interpretation.

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Karam, Emely Z., Thomas R. Hedges, III, and Alvaro Sanabria. "Paroxysmal Tonic Upgaze Associated With Proprioceptive Stimulation." Journal of Pediatric Ophthalmology and Strabismus 40, no. 3 (May 1, 2003): 176–78. http://dx.doi.org/10.3928/0191-3913-20030501-17.

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Sakai, Yoshihito, Yoshifumi Morita, Keitaro Kawai, Jo Fukuhara, Tadashi Ito, Kazunori Yamazaki, Tsuyoshi Watanabe, Norimitsu Wakao, and Hiroki Matsui. "Targeted vibratory therapy as a treatment for proprioceptive dysfunction: Clinical trial in older patients with chronic low back pain." PLOS ONE 19, no. 7 (July 19, 2024): e0306898. http://dx.doi.org/10.1371/journal.pone.0306898.

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Introduction Proprioceptive function declines with age, leading to falls, pain, and difficulties in performing activities of daily living among older adults. Although individuals with low back pain (LBP) exhibit decreased lumbosacral proprioception in various postures, the mechanism by which reduced proprioceptive function causes LBP remains uncertain. Vibratory stimulation may enhance proprioceptive function; however, its efficacy in treating LBP has not been investigated. Thus, we investigated the feasibility of improving proprioceptive function and its effect on alleviating chronic LBP in older patients through targeted vibratory therapy (TVT) administration. Methods This single arm designed trial included older patients aged >65 years with non-specific chronic LBP. TVT involved applying vibratory stimulation, matching the frequency of dysfunctional receptors, for 1 min daily over 14 days to activate proprioceptors; patients performed TVT three times daily at home. In cases of reduced proprioceptive function at multiple sites, TVT was aimed at the lowest frequency band value. LBP and proprioceptive function were evaluated at 2 weeks after TVT and at 2 weeks after the end of TVT in patients with declined proprioception in the trunk or lower extremities. Results Overall, 56 patients with chronic LBP were enrolled; 32 patients were recruited for treatment based on a proprioceptive dysfunction diagnosis and 24 patients were recruited with a normal diagnosis with no significant differences observed between the two sets of patients in sarcopenia-related factors and clinical proprioception-related characteristics. No patient had any adverse events. Two weeks after TVT, the numerical pain rating scale score improved to <3 points in 78.1% of patients, with 73.1% of patients achieving a score of ≤ 3 points. Proprioceptive function improved in 81.3% of cases, and engagement in activities of daily living improved significantly. Conclusions TVT demonstrated efficacy in improving proprioception and alleviating LBP in older patients with impaired proprioceptive function without affecting non-targeted proprioceptors.

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Shvarkov, S. B., E. U. Titova, Z. M. Mizieva, O. S. Matveeva, and A. N. Bobrovskaya. "APPLICATION OF INTEGRATED PROPRIOCEPTIVE CORRECTION IN MOTOR RECOVERY IN PATIENTS WITH STROKE." Journal of Clinical Practice 2, no. 3 (September 15, 2011): 3–8. http://dx.doi.org/10.17816/clinpract233-8.

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We assessed the application of the proprioceptive correction method supporting stimulating foot massage "PIONt" and pull-suit "Regent" in medical rehabilitation of patients underwent spinal or cerebral strokes. The analysis of the neurological deficiency dynamics was performed; effectiveness of the neuro-rehabilitation predictors and mechanisms of proprioceptive correction method action were discussed. The significance of proprioceptive correction methods in a comprehensive restoration of neurologic function in stroke patients was shown.

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Vargas, Luis, He (Helen) Huang, Yong Zhu, and Xiaogang Hu. "Static and dynamic proprioceptive recognition through vibrotactile stimulation." Journal of Neural Engineering 18, no. 4 (July 2, 2021): 046093. http://dx.doi.org/10.1088/1741-2552/ac0d43.

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Christensen, MS, and MJ Grey. "Functional electrical stimulation – the role of proprioceptive feedback." NeuroImage 47 (July 2009): S150. http://dx.doi.org/10.1016/s1053-8119(09)71536-8.

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Litwin, Piotr, Beata Zybura, and Paweł Motyka. "Tactile information counteracts the attenuation of rubber hand illusion attributable to increased visuo-proprioceptive divergence." PLOS ONE 15, no. 12 (December 30, 2020): e0244594. http://dx.doi.org/10.1371/journal.pone.0244594.

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Sense of body ownership is an immediate and distinct experience of one’s body as belonging to oneself. While it is well-recognized that ownership feelings emerge from the integration of visual and somatosensory signals, the principles upon which they are integrated are still intensely debated. Here, we used the rubber hand illusion (RHI) to examine how the interplay of visual, tactile, and proprioceptive signals is governed depending on their spatiotemporal properties. For this purpose, the RHI was elicited in different conditions varying with respect to the extent of visuo-proprioceptive divergence (i.e., the distance between the real and fake hands) and differing in terms of the availability and spatiotemporal complexity of tactile stimulation (none, simple, or complex). We expected that the attenuating effect of distance on illusion strength will be more pronounced in the absence of touch (when proprioception gains relatively higher importance) and absent in the presence of complex tactile signals. Additionally, we hypothesized that participants with greater proprioceptive acuity—assessed using an elbow joint position discrimination task—will be less susceptible to the illusion, but only under the conditions of limited tactile stimulation. In line with our prediction, RHI was attenuated at the farthest distance only when tactile information was absent or simplified, but the attenuation was effectively prevented by the use of complex tactile stimulation—in this case, RHI was comparably vivid at both distances. However, passive proprioceptive acuity was not related to RHI strength in either of the conditions. The results indicate that complex-structured tactile signals can override the influence of proprioceptive signals in body attribution processes. These findings extend our understanding of body ownership by showing that it is primarily determined by informative cues from the most relevant sensory domains, rather than mere accumulation of multisensory evidence.

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Puspitosari, Aniek, and Ninik Nurhidayah. "Sensory Stimulation Activities Improving Quality of Life of Elderly People in Elderly Communities." Jurnal Penelitian Pendidikan IPA 9, no. 12 (December 20, 2023): 11038–44. http://dx.doi.org/10.29303/jppipa.v9i12.5572.

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The aging process has an impact on social, economic and health aspects of life. The presence of elderly people with all health problems causes a decrease in quality of life. One effort to overcome physical health problems, especially sensory organs, is by providing sensory stimulation activities to the elderly. Sensory stimulation activities by stimulating gustatory/oral motor, visual, olfactory, tactile, auditory, vestibular and proprioceptive. This study aims to determine the effect of providing sensory stimulation activities on the quality of life of the elderly. The research method was a pre-experimental one group pretest-posttest design with a sample size of 44 elderly people in the elderly community in RW 8 area of Kemiri Village, Kebakkramat, Karanganyar. Intervention by providing 10 sensory stimulation activities. Quality of life is measured by the World Health Organization Quality of Life (WHOQOL-BREF) before and after 8 section. The data analysis method uses Paired Sample T Test. The results showed Paired sample t-test Asmyp Sig. (2-tailed) = 0.000, which means that the p-value < α (0.05), which means that the Sensory Stimulation activity intervention has an effect on the quality of life of the elderly in the elderly community in RW 8 area of Kemiri Village, Kebakkramat, Karanganyar.

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Ito, Tadashi, Yoshihito Sakai, Yohei Ito, Kazunori Yamazaki, and Yoshifumi Morita. "Association Between Back Muscle Strength and Proprioception or Mechanoreceptor Control Strategy in Postural Balance in Elderly Adults with Lumbar Spondylosis." Healthcare 8, no. 1 (March 10, 2020): 58. http://dx.doi.org/10.3390/healthcare8010058.

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This study aimed to investigate the relationship between back muscle strength and proprioception or mechanoreceptor control strategies used for postural balance in elderly adults with lumbar spondylosis. The displacement of the center of pressure (COP) excursion was determined in 24 elderly adults with lumbar spondylosis and 24 healthy young adults while the participants were standing upright on a balance board with their eyes closed. Vibratory stimulations of 30, 60, and 240 Hz were applied to the gastrocnemius (GS) and lumbar multifidus (LM) muscles to evaluate the effect of different proprioceptive signals on postural control. Back muscle strength was evaluated. Spearman’s rank correlation analysis was performed to determine the relationship between back muscle strength and significant COP excursion. Compared with young adults, elderly adults with lumbar spondylosis showed an increase in COP excursion displacement when a vibratory stimulation of 240 Hz was applied to the GS (P = 0.002) and LM muscles (P < 0.001). LM stimulation at 240 Hz was significantly associated with back muscle strength (P = 0.038). Postural control assessment with 240-Hz mechanoreceptor stimulation of the trunk could be a good indicator of postural instability due to over-dependence on mechanoreceptors and back muscle weakness in elderly adults with lumbar spondylosis.

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Carel, Christophe, Isabelle Loubinoux, Kader Boulanouar, Claude Manelfe, Olivier Rascol, Pierre Celsis, and François Chollet. "Neural Substrate for the Effects of Passive Training on Sensorimotor Cortical Representation: A Study with Functional Magnetic Resonance Imaging in Healthy Subjects." Journal of Cerebral Blood Flow & Metabolism 20, no. 3 (March 2000): 478–84. http://dx.doi.org/10.1097/00004647-200003000-00006.

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Repetitive passive movements are part of most rehabilitation procedures, especially in patients with stroke and motor deficit. However, little is known about the consequences of repeated proprioceptive stimulations on the intracerebral sensorimotor network in humans. Twelve healthy subjects were enrolled, and all underwent two functional magnetic resonance imaging (fMRI) sessions separated by a 1-month interval. Passive daily movement training was performed in six subjects during the time between the two fMRI sessions. The other six subjects had no training and were considered as the control group. The task used during fMRI was calibrated repetitive passive flexion-extension of the wrist similar to those performed during training. The control task was rest. The data were analyzed with SPM96 software. Images were realigned, smoothed, and put into Talairach's neuroanatomical space. The time effect from the repetition of the task was assessed in the control group by comparing activation versus rest in the second session with activation versus rest in the first session. This time effect then was used as null hypothesis to assess the training effect alone in our trained group. Passive movements compared with rest showed activation of most of the cortical areas involved in motor control (i.e., contralateral primary sensorimotor cortex, supplementary motor area [SMA], cingulum, Brodmann area 40, ipsilateral cerebellum). Time effect comparison showed a decreased activity of the primary sensorimotor cortex and SMA and an increased activity of ipsilateral cerebellar hemisphere, compatible with a habituation effect. Training brought about an increased activity of contralateral primary sensorimotor cortex and SMA. A redistribution of SMA activity was observed. The authors demonstrated that passive training with repeated proprioceptive stimulation induces a reorganization of sensorimotor representation in healthy subjects. These changes take place in cortical areas involved in motor preparation and motor execution and represent the neural basis of proprioceptive training, which might benefit patients undergoing rehabilitative procedures.

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Ito, Tadashi, Yoshihito Sakai, Kazunori Yamazaki, Reiya Nishio, Yohei Ito, and Yoshifumi Morita. "Postural Strategy in Elderly, Middle-Aged, and Young People during Local Vibratory Stimulation for Proprioceptive Inputs." Geriatrics 3, no. 4 (December 19, 2018): 93. http://dx.doi.org/10.3390/geriatrics3040093.

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Proprioceptive input may greatly affect postural stability. However, the proprioceptive postural strategy in elderly, middle-aged, and young people has not been investigated sufficiently. Hence, in this study, we aimed to investigate differences in proprioceptive postural strategies of elderly, middle-aged, and young people. The center of pressure displacement was determined in 23 elderly, 23 middle-aged, and 23 young people during upright stance on a balance board with their eyes closed. Vibratory stimulations at 30, 60, and 240 Hz were applied to the lumbar multifidus (LM) and gastrocnemius (GS) muscles to evaluate the contributions of different proprioceptive signals used in balance control. Compared with middle-aged and young people, elderly people showed a high dependence on postural control of the GS at 30 Hz (p-values: Young and elderly: 0.033; middle-aged and elderly: 0.001). Moreover, compared with young people, elderly people were more dependent on postural control of the LM at 240 Hz (p = 0.016). There were no significant differences with respect to the GS at 60 and 240 Hz, and with respect to the LM at 30 and 60 Hz between the elderly, young, and middle-aged people. Thus, the postural control strategy of elderly people depends on the GS at 30 Hz.

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Zwoliński, Tomasz, Magdalena Wujtewicz, Jolanta Szamotulska, Tomasz Sinoracki, Piotr Wąż, Rita Hansdorfer-Korzon, Andrzej Basiński, and Rik Gosselink. "Feasibility of Chest Wall and Diaphragm Proprioceptive Neuromuscular Facilitation (PNF) Techniques in Mechanically Ventilated Patients." International Journal of Environmental Research and Public Health 19, no. 2 (January 15, 2022): 960. http://dx.doi.org/10.3390/ijerph19020960.

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Physical therapy is part of the treatment for patients admitted to ICU. Proprioceptive neuromuscular facilitation (PNF) is one of the physiotherapy concepts including manual techniques and verbal stimulation. The purpose of this paper is to examine the feasibility of PNF techniques in mechanically ventilated (MV) ICU patients. Another aim is to verify whether the technique using resistance during the patient’s inhalation will have a different effect than the technique used to teaching the correct breathing patterns. Methods: Patients admitted to tertiary ICU were enrolled in this study, randomly divided into two groups, and received four 90-second manual breathing stimulations each. The following vital signs were assessed: HR, SBP, DBP, and SpO2. Results: 61 MV ICU adult patients (mean age 67.8; 25 female and 36 male) were enrolled in this study. No significant differences in HR, SBP, and DBP were observed both for two techniques measured separately and between them. Statistically significant differences were noticed analysing SpO2 in the rhythmic initiation technique (RIT) group (p-value = 0.013). Conclusions: Short-term PNF interventions did not influence clinically relevant vital parameters among MV patients and seem to be feasible in this group of ICU patients.

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Holmberg, Johan, Mikael Karlberg, Per-Anders Fransson, and Måns Magnusson. "Phobic postural vertigo: body sway during vibratory proprioceptive stimulation." NeuroReport 14, no. 7 (May 2003): 1007–11. http://dx.doi.org/10.1097/01.wnr.0000070191.28954.a5.

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Holmberg, Johan, Mikael Karlberg, Per-Anders Fransson, and Måns Magnusson. "Phobic postural vertigo: body sway during vibratory proprioceptive stimulation." NeuroReport 14, no. 7 (May 2003): 1007–11. http://dx.doi.org/10.1097/00001756-200305230-00020.

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Karnath, H. O., E. Reich, C. Rorden, M. Fetter, and J. Driver. "The perception of body orientation after neck-proprioceptive stimulation." Experimental Brain Research 143, no. 3 (January 30, 2002): 350–58. http://dx.doi.org/10.1007/s00221-001-0996-2.

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Lucas-Osma, Ana M., Yaqing Li, Shihao Lin, Sophie Black, Rahul Singla, Karim Fouad, Keith K. Fenrich та David J. Bennett. "Extrasynaptic α5GABAA receptors on proprioceptive afferents produce a tonic depolarization that modulates sodium channel function in the rat spinal cord". Journal of Neurophysiology 120, № 6 (1 грудня 2018): 2953–74. http://dx.doi.org/10.1152/jn.00499.2018.

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Анотація:

Activation of GABAA receptors on sensory axons produces a primary afferent depolarization (PAD) that modulates sensory transmission in the spinal cord. While axoaxonic synaptic contacts of GABAergic interneurons onto afferent terminals have been extensively studied, less is known about the function of extrasynaptic GABA receptors on afferents. Thus, we examined extrasynaptic α5GABAA receptors on low-threshold proprioceptive (group Ia) and cutaneous afferents. Afferents were impaled with intracellular electrodes and filled with neurobiotin in the sacrocaudal spinal cord of rats. Confocal microscopy was used to reconstruct the afferents and locate immunolabelled α5GABAA receptors. In all afferents α5GABAA receptors were found throughout the extensive central axon arbors. They were most densely located at branch points near sodium channel nodes, including in the dorsal horn. Unexpectedly, proprioceptive afferent terminals on motoneurons had a relative lack of α5GABAA receptors. When recording intracellularly from these afferents, blocking α5GABAA receptors (with L655708, gabazine, or bicuculline) hyperpolarized the afferents, as did blocking neuronal activity with tetrodotoxin, indicating a tonic GABA tone and tonic PAD. This tonic PAD was increased by repeatedly stimulating the dorsal root at low rates and remained elevated for many seconds after the stimulation. It is puzzling that tonic PAD arises from α5GABAA receptors located far from the afferent terminal where they can have relatively little effect on terminal presynaptic inhibition. However, consistent with the nodal location of α5GABAA receptors, we find tonic PAD helps produce sodium spikes that propagate antidromically out the dorsal roots, and we suggest that it may well be involved in assisting spike transmission in general. NEW & NOTEWORTHY GABAergic neurons are well known to form synaptic contacts on proprioceptive afferent terminals innervating motoneurons and to cause presynaptic inhibition. However, the particular GABA receptors involved are unknown. Here, we examined the distribution of extrasynaptic α5GABAA receptors on proprioceptive Ia afferents. Unexpectedly, these receptors were found preferentially near nodal sodium channels throughout the afferent and were largely absent from afferent terminals. These receptors produced a tonic afferent depolarization that modulated sodium spikes, consistent with their location.

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Motyka, Paweł, and Piotr Litwin. "Proprioceptive Precision and Degree of Visuo-Proprioceptive Discrepancy Do Not Influence the Strength of the Rubber Hand Illusion." Perception 48, no. 9 (July 30, 2019): 882–91. http://dx.doi.org/10.1177/0301006619865189.

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Rubber hand illusion is caused by spatiotemporally congruent visuotactile stimulation which induces a sense of ownership towards a fake limb. We tested two predictions of the Bayesian bottom-up model; namely, that the strength of the illusion is inversely proportional to (a) the distance separating hands and (b) the precision of proprioceptive signals. To manipulate distance, we displaced participants’ hands to either a position close to (8 cm) or far from (24 cm) the rubber hand. Before manipulation, we assessed proprioceptive abilities in a task requiring active reproduction of one’s arm’s position. Proprioceptive precision was operationalised as inversely related to the variance of the estimations. Multiple regression showed that both for subjective and physiological measures neither distance, nor proprioceptive precision, nor their interaction were predictors of illusion strength. Bayes factor analyses provided evidence for null effects. Our findings suggest the limited relevance of proprioception for the strength of visuo-haptically induced rubber hand illusion.

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Mujunen, Toni, Timo Nurmi, and Harri Piitulainen. "Corticokinematic coherence is stronger to regular than irregular proprioceptive stimulation of the hand." Journal of Neurophysiology 126, no. 2 (August 1, 2021): 550–60. http://dx.doi.org/10.1152/jn.00095.2021.

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Cortical proprioceptive processing can be investigated using corticokinematic coherence (CKC). The findings show that CKC method is sensitive to temporal stability in the stimulation sequence. Although both regular and irregular sequences resulted in robust coherence, the regular stimulation sequence with pneumatic movement actuator is recommended to maximize coherence strength and reproducibility to allow better comparability between groups or populations.

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Fawaz, Shereen I., Shin-Ichi Izumi, Soha M. Hamada, Abir A. Omara, Ghada O. Wassef, Heba Gamal Saber, and Sherihan M. Salama. "Role of Cervical Spinal Magnetic Stimulation in Improving Posture and Functional Ambulation of Patients with Relapsing Remitting Multiple Sclerosis." Rehabilitation Research and Practice 2022 (November 21, 2022): 1–8. http://dx.doi.org/10.1155/2022/6009104.

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Balance impairment is one of the hallmarks of early MS. Proprioceptive deficit was found to be one of the main causes of this imbalance. The cervical enlargement has a strong proprioceptive system, with its projections to the reticular formation and the central pattern generators, helping in rhythmic pattern generation and alternate leg movements. Repetitive trans-spinal magnetic stimulation (rTSMS) is a noninvasive technique, which can trigger massive proprioceptive afferents. Therefore, it has the potential of improving proprioceptive deficits and motor control. Objective. To determine the effectiveness of repetitive cervical magnetic stimulation in improving functional ambulation of patients with relapsing remitting multiple sclerosis (RRMS). Design. Prospective sequential clinical trial. Setting. University and academic hospital. Participants. A total of 32 participants ( N = 32 ) with RRMS. Interventions. Outpatient rehabilitation. The 32 patients received 10 sessions over two weeks of 20 Hz cervical spinal magnetic stimulation (SMS). Both groups were assessed at baseline, after 2 weeks, then one month later. Patients were enrolled as a control group at first and received Sham SMS, and then a wash out period of one month was done for all the patients, followed by a baseline assessment. Second, the same 32 patients rejoined as the active group, which received real magnetic stimulation. Both groups performed an intensive physical therapy program with the spinal magnetic stimulation. Main Outcome Measures. Extended Disability status score (EDSS), Timed up and Go test (TUG), Mini-Best test, dynamic posturography sensory organization composite score, and motor composite score. Results. Thirty-two RRMS patients with EDSS range from 1.5 to 6. They showed statistically significant difference between active and control groups in Mini-Best test score. We divided our patients according to EDSS into 3 subgroups: (a) mild: ≤2.5, (b) moderate: 3-5.5, and (c) severe: ≥6. Mild cases showed significant differences in EDSS score, TUG test, Mini-Best test, and dynamic posturography sensory composite scale. The effect size between the different patient subgroups was also measured and showed highly significant improvements in all measured parameters among our mild patients, indicating that this subgroup could be the best responders to cervical repetitive high-frequency magnetic stimulation. Moderate cases showed highly significant improvement in TUG score and Mini-Best test and significant change in EDSS score and the dynamic posturography sensory composite score. Severe cases showed only significant improvements in TUG, Mini-Best test, and sensory composite score. Conclusion. Cervical repetitive magnetic stimulation can help improve balance and functional ambulation and decreases the risk of falls in RRMS patients, especially in the mild, low disability cases.

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He, Jieying, Chong Li, Jiali Lin, Beibei Shu, Bin Ye, Jianhui Wang, Yifang Lin, and Jie Jia. "Proprioceptive Training with Visual Feedback Improves Upper Limb Function in Stroke Patients: A Pilot Study." Neural Plasticity 2022 (January 15, 2022): 1–10. http://dx.doi.org/10.1155/2022/1588090.

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Анотація:

Proprioceptive deficit is one of the common sensory impairments following stroke and has a negative impact on motor performance. However, evidence-based training procedures and cost-efficient training setups for patients with poststroke are still limited. We compared the effects of proprioceptive training versus nonspecific sensory stimulation on upper limb proprioception and motor function rehabilitation. In this multicenter, single-blind, randomized controlled trial, 40 participants with poststroke hemiparesis were enrolled from 3 hospitals in China. Participants were assigned randomly to receive proprioceptive training involving passive and active movements with visual feedback (proprioceptive training group [PG]; n = 20 ) or nonspecific sensory stimulation (control group [CG]; n = 20 ) 20 times in four weeks. Each session lasted 30 minutes. A clinical assessor blinded to group assignment evaluated patients before and after the intervention. The primary outcome was the change in the motor subscale of the Fugl-Meyer assessment for upper extremity (FMA-UE-M). Secondary outcomes were changes in box and block test (BBT), thumb localization test (TLT), the sensory subscale of the Fugl-Meyer assessment for upper extremity (FMA-UE-S), and Barthel Index (BI). The results showed that the mean change scores of FMA-UE were significantly greater in the PG than in the CG ( p = 0.010 for FMA-UE-M, p = 0.033 for FMA-UE-S). The PG group was improved significantly in TLT ( p = 0.010 ) and BBT ( p = 0.027 ), while there was no significant improvement in TLT ( p = 0.083 ) and BBT ( p = 0.107 ) for the CG group. The results showed that proprioceptive training was effective in improving proprioception and motor function of the upper extremity in patients with poststroke. This trial is registered in the Chinese Clinical Trial Registry (ChiCTR2000037808).

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Sonner, Patrick M., and David R. Ladle. "Early postnatal development of GABAergic presynaptic inhibition of Ia proprioceptive afferent connections in mouse spinal cord." Journal of Neurophysiology 109, no. 8 (April 15, 2013): 2118–28. http://dx.doi.org/10.1152/jn.00783.2012.

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Sensory feedback is critical for normal locomotion and adaptation to external perturbations during movement. Feedback provided by group Ia afferents influences motor output both directly through monosynaptic connections and indirectly through spinal interneuronal circuits. For example, the circuit responsible for reciprocal inhibition, which acts to prevent co-contraction of antagonist flexor and extensor muscles, is driven by Ia afferent feedback. Additionally, circuits mediating presynaptic inhibition can limit Ia afferent synaptic transmission onto central neuronal targets in a task-specific manner. These circuits can also be activated by stimulation of proprioceptive afferents. Rodent locomotion rapidly matures during postnatal development; therefore, we assayed the functional status of reciprocal and presynaptic inhibitory circuits of mice at birth and compared responses with observations made after 1 wk of postnatal development. Using extracellular physiological techniques from isolated and hemisected spinal cord preparations, we demonstrate that Ia afferent-evoked reciprocal inhibition is as effective at blocking antagonist motor neuron activation at birth as at 1 wk postnatally. In contrast, at birth conditioning stimulation of muscle nerve afferents failed to evoke presynaptic inhibition sufficient to block functional transmission at synapses between Ia afferents and motor neurons, even though dorsal root potentials could be evoked by stimulating the neighboring dorsal root. Presynaptic inhibition at this synapse was readily observed, however, at the end of the first postnatal week. These results indicate Ia afferent feedback from the periphery to central spinal circuits is only weakly gated at birth, which may provide enhanced sensitivity to peripheral feedback during early postnatal experiences.

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Ito, Tadashi, Yoshihito Sakai, Kazunori Yamazaki, Yohei Ito, Keitaro Kawai, Yoshiji Kato, Hideshi Sugiura, and Yoshifumi Morita. "Postural Sway in Older Patients with Sagittal Imbalance and Young Adults during Local Vibratory Proprioceptive Stimulation." Healthcare 9, no. 2 (February 15, 2021): 210. http://dx.doi.org/10.3390/healthcare9020210.

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This study aimed to assess differences in somatosensory control strategies between older patients with sagittal imbalance and young adults during postural tasks. The center of pressure displacement in 27 older patients with sagittal imbalance and 27 young adults was determined upon standing blindfolded on a balance board. Vibratory stimulation at 56 to 100 Hz was applied bilaterally to the gastrocnemius and soleus muscles (GS) and lumbar multifidus to evaluate the contributions of proprioceptive signals to postural control. Data of older patients and young adults were compared using the Mann–Whitney U-test or independent sample t-tests. Compared with the young adults, the older patients were significantly more reliant on the GS (p < 0.005) for their postural control and showed a higher relative proprioceptive weighting ratio (RPW) (p = 0.038). The postural strategy adopted by the older patients depended on the level of proprioceptive stimulation applied to the GS, and the postural control strategy of the ankle correlated with RPW. Overall, this study identifies RPW as a novel measure of postural strategy in older patients with sagittal imbalance and provides an understanding of strategies used to maintain balance, which may assist in developing preventative measures to reduce the risk of falls.

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Rizzo-Sierra, Carlos V., Alexander Gonzalez-Castaño, and Fidias E. Leon-Sarmiento. "Galvanic vestibular stimulation: a novel modulatory countermeasure for vestibular-associated movement disorders." Arquivos de Neuro-Psiquiatria 72, no. 1 (January 2014): 72–77. http://dx.doi.org/10.1590/0004-282x20130182.

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Анотація:

Motion sickness or kinetosis is the result of the abnormal neural output originated by visual, proprioceptive and vestibular mismatch, which reverses once the dysfunctional sensory information becomes coherent. The space adaptation syndrome or space sickness relates to motion sickness; it is considered to be due to yaw, pith, and roll coordinates mismatch. Several behavioural and pharmacological measures have been proposed to control these vestibular-associated movement disorders with no success. Galvanic vestibular stimulation has the potential of up-regulating disturbed sensory-motor mismatch originated by kinetosis and space sickness by modulating the GABA-related ion channels neural transmission in the inner ear. It improves the signal-to-noise ratio of the afferent proprioceptive volleys, which would ultimately modulate the motor output restoring the disordered gait, balance and human locomotion due to kinetosis, as well as the spatial disorientation generated by gravity transition.

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Fransson, Per-Anders, Magnus Hjerpe, and Rolf Johansson. "Adaptation of multi-segmented body movements during vibratory proprioceptive and galvanic vestibular stimulation." Journal of Vestibular Research 17, no. 1 (September 1, 2007): 47–62. http://dx.doi.org/10.3233/ves-2007-17106.

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Control of orthograde posture and use of adaptive adjustments constitutes essential topics of human movement control, both in maintenance of static posture and in ensuring body stability during locomotion. The objective was to investigate, in twelve normal subjects, how head, shoulder, hip and knee movements and torques induced towards the support surface were affected by vibratory proprioceptive and galvanic vestibular stimulation, and to investigate whether movement pattern, body posture and movement coordination were changed over time. Our findings suggest that the adaptive process to enhance stability involves both alteration of the multi-segmented movement pattern and alteration of body posture. The magnitude of the vibratory stimulation intensity had a prominent influence on the evoked multi-segmented movement pattern. The trial conditions also influenced whether the posture were altered and if these posture adjustments were done directly at stimulation onset or gradually over a longer period. Moreover, the correlation values showed that the subjects, primarily during trials with vibratory stimulation alone, significantly increased the body movement coordination at stimulation onset and maintained this movement pattern throughout the stimulation period. Furthermore, when exposed to balance perturbations the test subjects synchronized significantly the head and torso movements in anteroposterior direction during all trial conditions.

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Seizova-Cajic, Tatjana, Janette L. Smith, Janet L. Taylor, and Simon C. Gandevia. "Proprioceptive Movement Illusions Due to Prolonged Stimulation: Reversals and Aftereffects." PLoS ONE 2, no. 10 (October 17, 2007): e1037. http://dx.doi.org/10.1371/journal.pone.0001037.

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Fransson, P., A. Hafstrom, M. Karlberg, M. Magnusson, A. Tjader, and R. Johansson. "Postural control adaptation during galvanic vestibular and vibratory proprioceptive stimulation." IEEE Transactions on Biomedical Engineering 50, no. 12 (December 2003): 1310–19. http://dx.doi.org/10.1109/tbme.2003.819851.

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Caudron, Sébastien, Fréderic Boy, Nicolas Forestier, and Michel Guerraz. "Influence of expectation on postural disturbance evoked by proprioceptive stimulation." Experimental Brain Research 184, no. 1 (August 17, 2007): 53–59. http://dx.doi.org/10.1007/s00221-007-1079-9.

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Wuehr, M., C. Schlick, K. Möhwald, and R. Schniepp. "Proprioceptive muscle tendon stimulation reduces symptoms in primary orthostatic tremor." Journal of Neurology 265, no. 7 (May 16, 2018): 1666–70. http://dx.doi.org/10.1007/s00415-018-8902-z.

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Hlavacka, F., Th Mergner, and B. Bolha. "Human self-motion perception during translatory vestibular and proprioceptive stimulation." Neuroscience Letters 210, no. 2 (May 1996): 83–86. http://dx.doi.org/10.1016/0304-3940(96)12667-7.

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Cvecka, Jan, Veronika Tirpakova, Milan Sedliak, Helmut Kern, Winfried Mayr, and Dušan Hamar. "Physical activity in elderly." European Journal of Translational Myology 25, no. 4 (August 25, 2015): 249. http://dx.doi.org/10.4081/ejtm.2015.5280.

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Анотація:

Aging is a multifactorial irreversible process associated with significant decline in muscle mass and neuromuscular functions. One of the most efficient methods to counteract age-related changes in muscle mass and function is physical exercise. An alternative effective intervention to improve muscle structure and performance is electrical stimulation. In the present work we present the positive effects of physical activity in elderly and a study where the effects of a 8-week period of functional electrical stimulation and strength training with proprioceptive stimulation in elderly are compared.

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Gomes de Castro, Thiago, Marcelle Matiazo Pinhatti, Clarissa Pinto Pizarro de Freitas, and William Barbosa Gomes. "Spatial numerical estimation within proprioceptive recalibration." Anales de Psicología 33, no. 1 (December 28, 2016): 180. http://dx.doi.org/10.6018/analesps.32.3.229671.

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Анотація:

Research has emphasized that the body's position in space and patterns of visual searching for stimuli are crucial variables to explain the ability to estimate distances numerically. In this paper, we tested the hypothesis that proprioception recalibration interferes in the ability to numerically estimate fixed peri-personal space. The Rubber Hand Illusion (RHI) experimental paradigm was applied as a tool to temporally manipulate the sense of proprioception in participant’s right hand. Seventeen college students were asked to estimate fixed horizontal spatial cues before and after two conditions of tactile stimulation within RHI (synchronous versus asynchronous stroking). Results evidenced that proprioceptive recalibration of the hand were temporally altered by both stroking patterns. However, the effects of numerically estimate fixed horizontal cues towards the body midline were only consistently observed in the synchronous stroking condition. Those findings suggest that numerical estimates of peri-personal fixed cues are strongly associated with proprioceptive recalibration, corroborating the literature on multisensory integration of perception.

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Santeiro, Thalia Helena Lima, Laís Barbosa de Castro Delgado, Estélio Henrique Martin Dantas, Francisco Miguel Pinto, and Carmen Silvia da Silva Martini. "Stimulation of sensory receptors by dynamic muscle reproduction in patients with immediate post-stroke sequelae and proprioceptive neuromuscular facilitation: a systematic review." CONTRIBUCIONES A LAS CIENCIAS SOCIALES 17, no. 7 (July 1, 2024): e8009. http://dx.doi.org/10.55905/revconv.17n.7-018.

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Анотація:

Objective: Review and synthesize the effectiveness of the dynamic muscle reprogramming/reeducation method with proprioceptive neuromuscular facilitation after stroke. Method: This is a literature review carried out in the Pubmed, Scielo, Physiotherapy Evidence Databese, Virtual Health Library, and Cochrane Library databases, between August 2021 and April 2022, including works that addressed PNF and the dynamic muscle reprogramming method. Results: 286 articles were found in the different databases and analyzed in different stages, starting with the title and abstract. 1 selected from PubMed, 4 eligible and only 1 selected; only selected from Cochrane Library; and in PEDro only 1 included. Conclusion: We did not achieve the aim of the study, however, we can elucidate that both methods promote effective stimulation of the somatosensory system. RDM stimulation is by voice command, without manipulation by the therapist, and micro-movements are made in the proprioceptive elements by the individual themselves to achieve the desired results.

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Chauhan Deepak Lohar, Rinki. "Comparative Analysis of Electrical Stimulation Techniques in Bell's Palsy Patients: A Study of Proprioceptive Neuro - Muscular Facilitation Versus Kabat Therapy Effects." International Journal of Science and Research (IJSR) 12, no. 8 (August 5, 2023): 1450–54. http://dx.doi.org/10.21275/sr23808235932.

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Dave, Nilay, and Vidhya Rajput. "Effectiveness of Proprioceptive Neuromuscular Facilitation Technique along with the Therapeutic Electrical Stimulation Protocol in Subjects with Foot Drop - An Experimental Study." International Journal of Science and Research (IJSR) 10, no. 4 (April 27, 2021): 72–78. https://doi.org/10.21275/sr21330225828.

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Horváth, Áron, Blanka Aranyosy, Orsolya Drozdovszky, Attila Szabo, and Ferenc Köteles. "Placebo and nocebo interventions impact perceived but not actual proprioceptive accuracy." PLOS ONE 19, no. 8 (August 30, 2024): e0307072. http://dx.doi.org/10.1371/journal.pone.0307072.

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Анотація:

Changes in performance caused by positive and negative expectations (i.e., placebo and nocebo responses) were found to play an important role in many aspects of motor performance. This study aimed to test the impact of placebo/nocebo responses and the assumed moderating role of dispositional optimism and anxiety on proprioceptive accuracy, an essential aspect of motor functions. 78 undergraduate university students completed questionnaires assessing dispositional optimism, state anxiety, and motivation to cooperate, then were randomly assigned to three experimental groups. A sham subliminal electric stimulation was applied with claimed positive (placebo group, n = 26), negative (nocebo group, n = 26) or neutral (control group, n = 26) impact on proprioceptive accuracy. Proprioceptive accuracy was measured with active and passive versions of the Joint Position Reproduction task before and after the intervention. Expected and perceived changes in performance were also assessed; changes in state anxiety, optimism, and motivation to cooperate were used as control variables (covariates). Mixed analyses of variance indicated that the experimental manipulation did not affect actual proprioceptive accuracy but impacted expected and perceived performance. Adding the covariates to the models did not substantially change the results. Further, no significant association emerged between actual and perceived change in performance in the active test, and only a weak correlation was found in the passive test. Expected performance did not predict actual performance but predicted perceived performance in both tasks. The results suggest that only perceived (subjective) aspects of proprioceptive accuracy are susceptible to placebo and nocebo interventions.

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Fiorio, Mirta, Caterina Mariotti, Marta Panzeri, Emanuele Antonello, Joseph Classen, and Michele Tinazzi. "The Role of the Cerebellum in Dynamic Changes of the Sense of Body Ownership: A Study in Patients with Cerebellar Degeneration." Journal of Cognitive Neuroscience 26, no. 4 (April 2014): 712–21. http://dx.doi.org/10.1162/jocn_a_00522.

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Анотація:

The sense of the body is deeply rooted in humans, and it can be experimentally manipulated by inducing illusions in at least two aspects: a subjective feeling of ownership and a proprioceptive sense of limb position. Previous studies mapped these different aspects onto anatomically distinct neuronal regions, with the ventral premotor cortex processing subjective experience of ownership and the inferior parietal lobule processing proprioceptive calibration. Lines of evidence suggest an involvement also of the cerebellum, but its precise role is not clear yet. To investigate the contribution of the cerebellum in the sense of body ownership, we applied the rubber-hand illusion paradigm in 28 patients affected by neurodegenerative cerebellar ataxia, selectively involving the cerebellum, and in 26 age-matched control participants. The rubber hand illusion is established by synchronous stroking of the participants' real unseen hand and a visible fake hand. Short asynchronous stroking does not bring about the illusion. We tested the subjective experience of the illusion, evaluated through a questionnaire and the proprioceptive drift of the real unseen hand toward the viewed rubber hand. In patients with cerebellar ataxia, we observed reduced sense of the subjective illusory experience specifically after synchronous stroking. In contrast, the proprioceptive drift was enhanced after synchronous and after asynchronous stimulation. These findings support the contention that the mechanisms underlying the presence of the illusion and the proprioceptive drift may be differently affected in different conditions. Impairment of the subjective sense of the illusion in cerebellar patients might hint at an involvement of cerebellar-premotor networks, whereas the proprioceptive drift typically associated with synchronous stroking appears to rely on other circuits, likely involving the cerebellum and the parietal regions.

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Melnikov, Andrey A., Ekaterina S. Ikonnikova, Roman Kh Lyukmanov та Natalia A. Suponeva. "Проприоцептивный контроль мышц верхней конечности у спортсменов-самбистов". Journal of Medical and Biological Research, № 3 (20 вересня 2024): 329–37. http://dx.doi.org/10.37482/2687-1491-z203.

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High proprioceptive sensitivity is an important factor in the efficiency of technical elements and athletic performance in many sports. However, proprioceptive control of the positions of upper limb segments and muscle effort in wrestlers has hardly been investigated. The purpose of this article was to study the reproduction accuracy of hand position and muscle effort during discrete contraction and relaxation of the forearm muscles in sambo athletes. Materials and methods. The research involved young sambo wrestlers (n = 10) and nonathletes (control, n = 15). We evaluated the reproduction accuracy of forearm pronation/supination angles (20, 50 and 80°) using a PABLO Handsensor (Tyromotion, Austria) and the accuracy of isometric muscle contraction during static pronation/supination, using a stationary hand joystick, in the ascending and descending directions of effort development (0, 20, 50 and 80 % of the maximum effort) according to the level of electromyographic activity of forearm pronators and supinators (Trust-M functional electrical stimulation system, Neurocore, Russia). Results. We found that proprioceptive control of forearm position accuracy and static effort during the contraction of forearm pronators and supinators did not differ between wrestlers and non-athletes. However, the absolute reproducibility error of 50 and 80 % of muscle effort during discrete relaxation of the pronators was lower (p < 0.01) in wrestlers than in non-athletes. Moreover, in the general sample, effort reproduction accuracy at pronators’ discrete contraction was higher than at discrete relaxation, which indicates a deficit of proprioceptive control of muscle effort during relaxation. Thus, exercising upper limb muscles in sambo improves proprioceptive control of discrete muscle relaxation. Further studies should determine the role of the established phenomenon in the effectiveness of wrestling skills and sports results.

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Niklasson, M., R. Tham, B. Larsby, and B. Eriksson. "The Influence of Visual and Somatosensory Input on the Vestibulo-Oculomotor Reflex of Pigmented Rats." Journal of Vestibular Research 1, no. 3 (May 1, 1991): 251–62. http://dx.doi.org/10.3233/ves-1991-1304.

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Eye movements were recorded in the pigmented rat during vestibular, optokinetic and combined visual-vestibular stimulation. The dominant time constant in pigmented rats, tested during angular vestibular stimulation in darkness, is about two times longer than the cupular time constant. The gain and the duration of nystagmus, achieved by angular vestibular stimulation, can be enhanced by visual impulses. This is most evident during an optokinetic temporonasal stimulation, but is also seen with a nasotemporal stimulation. A mere optokinetic monocular stimulation without a synchronous vestibular excitation causes nystagmus only when the stimuli has a temporonasal direction. The duration of nystagmus, achieved by angular vestibular stimulation, is prolonged by disturbances of the neck proprioceptive system. This is more evident during a simultaneous visual input than in darkness. The ability to cancel nystagmus during conflicting vestibular and optokinetic impulses is well developed in the pigmented rat.

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Christensen, Mark Schram, and Michael James Grey. "Modulation of proprioceptive feedback during functional electrical stimulation: an fMRI study." European Journal of Neuroscience 37, no. 11 (March 5, 2013): 1766–78. http://dx.doi.org/10.1111/ejn.12178.

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Popov, K. E., G. V. Kozhina, B. N. Smetanin, and V. Y. Shlikov. "Postural responses to combined vestibular and hip proprioceptive stimulation in man." European Journal of Neuroscience 11, no. 9 (September 1999): 3307–11. http://dx.doi.org/10.1046/j.1460-9568.1999.00733.x.

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