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Relevant bibliographies by topics / Elbow movement

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Academic literature on the topic 'Elbow movement'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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Journal articles on the topic "Elbow movement"

1

Morrison, Craig S., Colby Clayburn, Duane Knudson, and Philip Haywood. "Accuracy of Visual Estimates of Joint Angle and Angular Velocity Using Criterion Movements." Perceptual and Motor Skills 100, no. 3 (June 2005): 599–606. http://dx.doi.org/10.2466/pms.100.3.599-606.

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A descriptive study to document undergraduate physical education majors' (22.8 ± 2.4 yr. old) estimates of sagittal plane elbow angle and angular velocity of elbow flexion visually was performed. 42 subjects rated videotape replays of 30 movements organized into three speeds of movement and two criterion elbow angles. Video images of the movements were analyzed with Peak Motus™ to measure actual values of elbow angles and peak angular velocity. Of the subjects 85.7% had speed ratings significantly correlated with true peak elbow angular velocity in all three angular velocity conditions. Few (16.7%) subjects' ratings of elbow angle correlated significantly with actual angles. Analysis of the subjects with good ratings showed the accuracy of visual ratings was significantly related to speed, with decreasing accuracy for slower speeds of movement. The use of criterion movements did not improve the small percentage of novice observers who could accurately estimate body angles during movement.

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Gribble, Paul L., and David J. Ostry. "Compensation for Interaction Torques During Single- and Multijoint Limb Movement." Journal of Neurophysiology 82, no. 5 (November 1, 1999): 2310–26. http://dx.doi.org/10.1152/jn.1999.82.5.2310.

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During multijoint limb movements such as reaching, rotational forces arise at one joint due to the motions of limb segments about other joints. We report the results of three experiments in which we assessed the extent to which control signals to muscles are adjusted to counteract these “interaction torques.” Human subjects performed single- and multijoint pointing movements involving shoulder and elbow motion, and movement parameters related to the magnitude and direction of interaction torques were manipulated systematically. We examined electromyographic (EMG) activity of shoulder and elbow muscles and, specifically, the relationship between EMG activity and joint interaction torque. A first set of experiments examined single-joint movements. During both single-joint elbow ( experiment 1) and shoulder ( experiment 2) movements, phasic EMG activity was observed in muscles spanning the stationary joint (shoulder muscles in experiment 1 and elbow muscles in experiment 2). This muscle activity preceded movement and varied in amplitude with the magnitude of upcoming interaction torque (the load resulting from motion of the nonstationary limb segment). In a third experiment, subjects performed multijoint movements involving simultaneous motion at the shoulder and elbow. Movement amplitude and velocity at one joint were held constant, while the direction of movement about the other joint was varied. When the direction of elbow motion was varied (flexion vs. extension) and shoulder kinematics were held constant, EMG activity in shoulder muscles varied depending on the direction of elbow motion (and hence the sign of the interaction torque arising at the shoulder). Similarly, EMG activity in elbow muscles varied depending on the direction of shoulder motion for movements in which elbow kinematics were held constant. The results from all three experiments support the idea that central control signals to muscles are adjusted, in a predictive manner, to compensate for interaction torques—loads arising at one joint that depend on motion about other joints.

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Zheng, Bin, and Christine L. MacKenzie. "The Control Strategy for Degrees of Freedom in Remote Prehension with a Tool." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 51, no. 19 (October 2007): 1358–62. http://dx.doi.org/10.1177/154193120705101918.

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Constructing movement couplings is essential for decreasing degrees-of-freedom for a compound movement that requires coordination over a multiple segments. Angular movements of joints in the upper limbs are examined, the pattern of movement couplings between prehension performed with the hands (natural prehension) and with a simple grasper held in the hands (remote prehension). In remote prehension, the shoulder and elbow joint are tightly associated with a clear in-phase joint to joint movement; the elbow and wrist display both anti- and in-phase movements due to the change of initial configuration of the upper limb when holding a tool. In contrast, the shoulder-elbow bond is mixed in natural prehension, but the elbow and wrist bond is predominant with an anti-phase pattern. With diversity for joint couplings, the movement consistency of the hinge is preserved with relatively smaller path variability. Results support the end-point control notion, i.e. movement is controlled by extrinsic coordinates close to the end-effectors of the movement system.

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Maeda, Rodrigo S., Tyler Cluff, Paul L. Gribble, and J. Andrew Pruszynski. "Compensating for intersegmental dynamics across the shoulder, elbow, and wrist joints during feedforward and feedback control." Journal of Neurophysiology 118, no. 4 (October 1, 2017): 1984–97. http://dx.doi.org/10.1152/jn.00178.2017.

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Moving the arm is complicated by mechanical interactions that arise between limb segments. Such intersegmental dynamics cause torques applied at one joint to produce movement at multiple joints, and in turn, the only way to create single joint movement is by applying torques at multiple joints. We investigated whether the nervous system accounts for intersegmental limb dynamics across the shoulder, elbow, and wrist joints during self-initiated planar reaching and when countering external mechanical perturbations. Our first experiment tested whether the timing and amplitude of shoulder muscle activity account for interaction torques produced during single-joint elbow movements from different elbow initial orientations and over a range of movement speeds. We found that shoulder muscle activity reliably preceded movement onset and elbow agonist activity, and was scaled to compensate for the magnitude of interaction torques arising because of forearm rotation. Our second experiment tested whether elbow muscles compensate for interaction torques introduced by single-joint wrist movements. We found that elbow muscle activity preceded movement onset and wrist agonist muscle activity, and thus the nervous system predicted interaction torques arising because of hand rotation. Our third and fourth experiments tested whether shoulder muscles compensate for interaction torques introduced by different hand orientations during self-initiated elbow movements and to counter mechanical perturbations that caused pure elbow motion. We found that the nervous system predicted the amplitude and direction of interaction torques, appropriately scaling the amplitude of shoulder muscle activity during self-initiated elbow movements and rapid feedback control. Taken together, our results demonstrate that the nervous system robustly accounts for intersegmental dynamics and that the process is similar across the proximal to distal musculature of the arm as well as between feedforward (i.e., self-initiated) and feedback (i.e., reflexive) control. NEW & NOTEWORTHY Intersegmental dynamics complicate the mapping between applied joint torques and the resulting joint motions. We provide evidence that the nervous system robustly predicts these intersegmental limb dynamics across the shoulder, elbow, and wrist joints during reaching and when countering external perturbations.

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Lee, Goo Joo, and Donghwi Park. "Ultrasonographic Findings of the Ulnar Nerve Following Elbow Flexion in Patients with Cubital Tunnel Syndrome." Pain Medicine 21, no. 11 (June 28, 2020): 2684–91. http://dx.doi.org/10.1093/pm/pnaa169.

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Abstract Objective To evaluate the ultrasonographic findings obtained following various degrees of elbow flexion in patients with cubital tunnel syndrome (CuTS). Design Retrospective, cross-sectional study. Setting General teaching hospital, rehabilitation unit. Subjects Electrophysiological and ultrasonographic assessments were performed on 11 elbows of healthy controls and 21 elbows of 17 patients with CuTS. Methods Dynamic movement of the ulnar nerve during elbow motion was measured. To measure ulnar nerve dynamic movement during elbow motion, the distance from the medial epicondyle (ME) to the nearest surface of the ulnar nerve toward the ME was measured at the cubital tunnel inlet at elbow extension (0°), elbow flexion to 60°, and elbow flexion to 90°. Results The distance between the ME and ulnar nerve was lower in CuTS patients than in healthy patients at all elbow flexion angles. This difference was statistically significant at 0° and 60° elbow flexion (P < 0.05). When calculating the cutoff value, the distance between the ME and ulnar nerve at full elbow extension for CuTS diagnosis was 0.53 cm (sensitivity = 71.4%, specificity = 90.7%). The distance ratio between the ME and ulnar nerve for diagnosis of ulnar neuropathy at the elbow was 24.4% (sensitivity = 76.2%, specificity = 100%). Conclusion Measurement of the distance between the ME and ulnar nerve in full elbow extension may facilitate the diagnosis of patients with CuTS. These findings may be important for CuTS diagnosis, as they were also observed in patients with mild-stage CuTS.

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Scott, Stephen H. "Comparison of Onset Time and Magnitude of Activity for Proximal Arm Muscles and Motor Cortical Cells Before Reaching Movements." Journal of Neurophysiology 77, no. 2 (February 1, 1997): 1016–22. http://dx.doi.org/10.1152/jn.1997.77.2.1016.

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Scott, Stephen H. Comparison of onset time and magnitude of activity for proximal arm muscles and motor cortical cells before reaching movements. J. Neurophysiol. 77: 1016–1022, 1997. The activity of motor cortical cells and proximal arm muscles during the initiation of planar reaching movements were analyzed to identify whether features of coordinated motor patterns of muscles spanning the elbow and shoulder were evident in the discharge patterns of motor cortical cells. Shoulder and elbow muscles were divided into four groups, flexors and extensors at each joint. Features of the initial agonist activity, onset time and magnitude, at the shoulder and elbow were compared for movements in different spatial directions. As observed for human movements, differences in the onset time and the relative magnitude of electromyographic activity (EMG) of muscles acting about the shoulder and elbow were dependent on the direction of movement. Motor cortical cells were categorized as elbow or shoulder related on the basis of their response to passive movement of the joints. Differences in the onset time and the relative magnitude of activity of cells related to the shoulder and elbow were both dependent on the direction of movement and were similar to those observed for muscles spanning these joints. There was a modest, but significant correlation between the onset time and magnitude of EMG for individual muscles. A similar magnitude-time coupling was observed for individual motor cortical cells. Variations in the discharge pattern of motor cortical cells before movement that mirror those observed for muscles spanning the shoulder and elbow support the potential role of primary motor cortex in the selection, timing, and magnitude of agonist motor patterns at the shoulder and elbow to initiate reaching movements.

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Ilic, Dusko B., Dragan M. Mirkov, and Slobodan Jaric. "Learning Transfer from Flexion to Extension Movements: Importance of the Final Position." Motor Control 2, no. 3 (July 1998): 221–27. http://dx.doi.org/10.1123/mcj.2.3.221.

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Nine subjects (experimental group) were tested on rapid elbow flexion and extension movements performed in the same final position, before and after extensive practice of the movements. Nine additional subjects (control group) were also tested, but without any practice between the tests. Comparison of the pretest and posttest results suggested that the experimental group decreased their variable error (i.e., standard deviation of the final movement position) in both practiced (elbow flexion) and nonpracticed (elbow extension) movements. The control group, however, did not improve in either of tested movements. The experimental group demonstrated lower variable error in the nonpracticed elbow extensions than the control group, while the same difference for practiced elbow flexion movements was slightly below the level of significance. The results support the importance of the final position in programming of rapid, self-terminated movements; however, they do not rule out the role of other kinetic and kinematic variables (such as movement distance).

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Park, Sangbum. "Effect of Task Difficulty on Muscle Activation Patterns during Rapid Single-Joint Movements." Perceptual and Motor Skills 94, no. 3_suppl (June 2002): 1157–67. http://dx.doi.org/10.2466/pms.2002.94.3c.1157.

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This study investigated the effect of spatial accuracy demands on movement organization by analyzing the amplitude of the agonist and antagonist muscle activities emerging during horizontal elbow-flexion movements toward spatial targets of varying difficulties. 8 subjects performed elbow-flexion movements toward targets of 3 sizes, located at 2 distances, as rapidly and accurately as possible. For each movement, the elbow angles and the activities of biceps brachii, brachioradialis, and lateral and long heads of triceps brachii were measured. Analysis on the kinematic variables indicated that final elbow angle and peak velocity decreased with increasing index of difficulty of the task in both movement-amplitude conditions. However, movement time increased with increasing index of difficulty. The amplitude of agonist and antagonist muscle activities measured for 100 msec. before movement initiation was also shown to decrease with increasing index of difficulty. Agonist and antagonist muscle activities measured during acceleration phase displayed similar patterns with those of premovement. These results suggest that the task difficulty affects movement organization, and the control system decreases the amplitude of agonist and antagonist muscle activities with an increase in the index of difficulty to enhance the controllability of the limb.

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Sainburg, R. L., M. F. Ghilardi, H. Poizner, and C. Ghez. "Control of limb dynamics in normal subjects and patients without proprioception." Journal of Neurophysiology 73, no. 2 (February 1, 1995): 820–35. http://dx.doi.org/10.1152/jn.1995.73.2.820.

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1. We recently showed that patients lacking proprioceptive input from their limbs have particular difficulty performing multijoint movements. In a pantomimed slicing gesture requiring sharp reversals in hand path direction, patients showed large hand path distortions at movement reversals because of failure to coordinate the timing of the separate reversals at the shoulder and elbow joints. We hypothesized that these reversal errors resulted from uncompensated effects of inertial interactions produced by changes in shoulder joint acceleration that were transferred to the elbow. We now test this hypothesis and examine the role of proprioceptive input by comparing the motor performance of five normal subjects with that of two patients with large-fiber sensory neuropathy. 2. Subjects were to trace each of six template lines presented randomly on a computer screen by straight overlapping out-and-back movements of the hand on a digitizing tablet. The lines originated from a common starting position but were in different directions and had different lengths. Directions and lengths were adjusted so that tracing movements would all require the same elbow excursion, whereas shoulder excursion would vary. The effects of varying interaction torques on elbow kinematics were then studied. The subject's dominant arm was supported in the horizontal plane by a low-inertia brace equipped with ball bearing joints and potentiometers under the elbow and shoulder. Hand position was monitored by a magnetic pen attached to the brace 1 cm above a digitizing tablet and could be displayed as a screen cursor. Vision of the subject's arm was blocked and the screen cursor was blanked at movement onset to prevent visual feedback during movement. Elbow joint torques were calculated from joint angle recordings and compared with electromyographic recordings of elbow joint musculature. 3. In control subjects, outward and inward paths were straight and overlapped the template lines regardless of their direction. As prescribed by the task, elbow kinematics remained the same across movement directions, whereas interaction torques varied substantially. The timing of the onsets of biceps activity and the offsets of triceps activity during elbow flexion varied systematically with direction-dependent changes in interaction torques. Controls exploited or dampened these interaction torques as needed to meet the kinematic demands of the task. 4. In contrast, the patients made characteristic errors at movement reversals that increased systematically across movement directions. These reversal errors resulted from improper timing of elbow and shoulder joint reversals.(ABSTRACT TRUNCATED AT 400 WORDS)

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Mel’nichouk, Alexander P., Natalia V. Bulgakova, Arkadij N. Tal’nov, Fredrik Hellström, Uwe Windhorst, and Alexander I. Kostyukov. "Movement-dependent positioning errors in human elbow joint movements." Experimental Brain Research 176, no. 2 (July 19, 2006): 237–47. http://dx.doi.org/10.1007/s00221-006-0612-6.

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Dissertations / Theses on the topic "Elbow movement"

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Paungmali, Aatit. "An investigation of a neuro-biological mechanism of a mobilisation-with-movement treatment /." St. Lucia, Qld, 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18040.pdf.

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Zheng, Tao, and 郑涛. "A bio-feedback rehabilitation system for neuromuscular recovery on elbow joint movement." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B47045917.

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Madelain, Pierre. "Efeitos da mobilização com movimento, segundo Mulligan, na epicondilite lateral do cotovelo: uma revisão da literatura." Bachelor's thesis, [s.n.], 2017. http://hdl.handle.net/10284/5881.

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Projeto de Graduação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Licenciado em Fisioterapia
Objetivo: Determinar a efetividade da mobilização com movimento (MCM) na epicondilite lateral (EL) do cotovelo. Metodologia: Pesquisa computadorizada nas bases de dados PubMed / Medline, PEDro, Scielo e Lilacs para identificar estudos randomizados controlados que avaliam a efetividade da MCM na EL. Resultados: Nesta revisão foram incluídos 6 estudos envolvendo 194 pacientes, com classificação metodológica de média aritmética 5,17 na escala de PEDro. Dos estudos incluídos nesta revisão verificou-se que 3 analisaram os efeitos da MCM em conjunto com um tratamento de fisioterapia e 3 como uma técnica de fisioterapia isolada. Todos os estudos analisados obtiveram resultados satisfatórios, a curto e médio prazo, em termos de alívio da dor, força de preensão e / ou funcionalidade. Conclusão: A MCM parece ser eficaz a curto e médio prazo no tratamento da LE.
Objective: To determine the effectiveness of mobilization with movement (MWM) in elbow lateral epicondylitis (LE). Methodology: Research on computerized databases PubMed / Medline, PEDro, Scielo and Lilacs to identify randomized controlled trials that evaluates the effectiveness of MWM in LE. Results: This review included 6 studies involving 194 patients, with arithmetic mean methodology classification of 5.17 on the PEDro scale. From the studies included in this review it was found that 3 analyzed the effects of MWM included in a physiotherapy treatment and 3 as an isolated physiotherapeutic technique. All the studies analyzed have shown satisfactory results, in short and medium term, in terms of pain relief, grip strength and / or functionality. Conclusion: MWM seems to be effective in the short and medium term in the treatment of LE.
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Sergio, Lauren E. (Lauren Elisabeth). "Coordination of multiple muscles in two degree of freedom elbow movements." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28916.

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The present study quantifies electromyographic variables in one and two degree of freedom elbow movements involving flexion/extension and pronation/supination, in order to understand the associated central commands. Agonist burst magnitude varied with motion in a second degree of freedom for some muscles but not for others. In movements for which a biarticular muscle acted as agonist in two degrees of freedom, agonist burst magnitudes were approximately the sum of the magnitudes in the component movements. Agonist burst magnitude varied with motion in a second degree of freedom for some, but not all, monoarticular muscles. When biarticular muscles acted as agonist in one degree of freedom and antagonist in the other, the muscle often displayed both components simultaneously. The additivity of EMG burst magnitudes in two degree of freedom movements and the presence of both agonist and antagonist bursts in a muscle suggest that central commands associated with motion in individual degrees of freedom are superimposed in producing two degree of freedom movements.

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Gribble, Paul L. "Musculo-skeletal geometry and the control of single degree of freedom elbow movements." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22735.

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Empirical and modelling studies are reported which explore ways in which the central nervous system might consider musculo-skeletal geometry when generating commands for single degree of freedom elbow flexion and extension movements. In a series of experiments it is shown that subjects do not perform rapid, goal-directed flexion and extension movements equally accurately in different parts of the elbow's workspace. In these experiments, movements of 10, 20 and 30 degrees in amplitude were tested using up to five different initial elbow angles. When performing flexions, subjects tended to overshoot targets when starting from extended positions, to undershoot targets when starting from more flexed positions, and to perform relatively accurate movements when starting from the centre of the workspace. Final position accuracy was more variable for extensions. When reliable differences existed for extensions, subjects tended to produce a pattern of results opposite to that of flexions: subjects overshot targets when starting from flexed positions and undershot targets when starting from more extended positions. A model of elbow movement based on the $ lambda$ version of the equilibrium-point hypothesis was used to assess the extent to which the pattern of errors obtained in the empirical studies could be reproduced by a control scheme that does not adjust commands in response to changing musculo-skeletal geometry, but rather uses one single invariant command throughout the workspace. The motivation for testing the invariant command notion was to explore the possibility that motion planning might be achieved without an explicit representation of musculo-skeletal geometry. Predicted patterns of final position errors across the workspace matched empirically obtained error patterns for flexions, but the model performed less well when predicting the pattern of errors observed for extension movements.

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Karst, Gregory Mark. "Multijoint arm movements: Predictions and observations regarding initial muscle activity at the shoulder and elbow." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184920.

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Understanding the control strategies that underlie multijoint limb movements is important to researchers in motor control, robotics, and medicine. Due to dynamic interactions between limb segments, choosing appropriate muscle activations for initiating multijoint arm movements is a complex problem, and the rules by which the nervous system makes such choices are not yet understood. The aim of the dissertation studies was to evaluate some proposed initiation rules based on their ability to correctly predict which shoulder and elbow muscles initiated planar, two-joint arm movements in various directions. Kinematic and electromyographic data were collected from thirteen subjects during pointing movements involving shoulder and elbow rotations in the horizontal plane. One of the rules tested, which is based on statics, predicted that the initial muscle activity at each joint is chosen such that the hand exerts an initial force in the direction of the target, while another rule, based on dynamics, predicted initial muscle activity such that the initial acceleration of the hand is directed toward the target. For both rules, the data contradict the predicted initial shoulder muscle activity for certain movement directions. Moreover, the effects of added inertial loads predicted by the latter rule were not observed when a 1.8 kg mass was added to the limb. The results indicated, however, that empirically derived rules, based on ψ, the target direction relative to the distal segment, could predict which muscles would be chosen to initiate movement in a given direction. Furthermore, the relative timing and magnitude of initial muscle activity at the shoulder and elbow varied systematically with ψ. Thus, the target direction relative to the forearm may be an important variable in determining initial muscle activations for multijoint arm movements. These findings suggest a control scheme for movement initiation in which simple rules suffice to launch the hand in the approximate direction of the target by first specifying a basic motor output pattern, then modulating the relative timing and magnitude of that pattern.

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Galloway, James Coleman. "Muscle torque-total torque relationships at the shoulder and elbow: Rules for initiating multijoint arm movements." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/282845.

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One concept central to theories of multijoint control concerns the selection of muscles for the appropriate joint motion. For multijoint movements, a given muscle torque at an individual joint can lead to flexion, extension, or very little motion, since mechanical effects coming from other segments interact with muscle torque. This study quantified the contribution of muscle torque to initial joint motion for horizontal arm movements throughout the workspace. Previous studies of arm mechanics have been limited to a few movements or have focused on one joint. In contrast, this study reports data for both the shoulder and elbow joints. Moreover, a large number of movements were used for which direction, excursion, and distance were manipulated. Using high speed video recordings and techniques of inverse dynamics, a ratio of muscle torque to total torque was computed for each movement as a measure of contribution of muscle torque to joint acceleration. One consistent finding was that the muscle torque contribution consistently differed between the shoulder and elbow for most of the workspace. At one joint, muscle torque directly contributed to acceleration with negligible interaction torque ('direct' muscle torque contribution), thus the joint appeared to act as the launcher of the arm. At the other joint, both muscle and interaction torques contributed to joint acceleration ('complex' contribution), thus the joint appeared to be responding to mechanical effects from motion of the launcher. This contrast between joints may provide a simplifying feature for multijoint arm control. Specifically, only one of the two joints has complex mechanics, while the other joint, surprisingly, has simplified mechanics similar to a single joint in isolation. Movements in this study also demonstrated a three fold covariance (muscle torque contribution, movement direction, and the relative excursions of the shoulder and elbow) regardless of distance. A covariance of movement features, historically viewed as a confound, may provide a further simplification for arm control by reducing the unknowns; namely, the muscle torque contribution is associated with a resultant direction and joint excursions, or a direction or set of excursions is achieved by the associated muscle torque contribution.

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Lee, Hui-Min. "Coordination of arm movements in healthy full term infants from the pre-reaching period to the onset of reaching." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 73 p, 2007. http://proquest.umi.com/pqdweb?did=1299819951&sid=6&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Bhat, Anjana N. "The emergence of purposeful reaching developmental changes and constraints in hand and joint kinematics of early arm movements /." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 6.59 Mb, 138 p, 2005. http://wwwlib.umi.com/dissertations/fullcit/3187605.

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Cheng, Hang-Shing, and 鄭恆星. "Improving Elbow Movement in Stroke Patients with External Torque Controlled by Myoelectric Signals." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/27648183646555137730.

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碩士
國立成功大學
機械工程學系
89
Stroke patients with upper motor unit lesion usually have observable muscle weakness in their affected side due to the abnormal efficiency of muscle contraction. The goal of this thesis is to enhance a stroke patient's muscle strength by adopting a control system which can actively provide the elbow joint with an appropriate torque based on EMG signals taken from triceps and biceps. By using this EMG controlled system the stroke patient's motor control capability for elbow joints can be improved and reduce the negative effects induced by muscle wealness. Due to the discrepancy between contraction efficiencies of triceps and biceps, the ratio of unilateral EMG signals to elbow torque resulting from isometric contraction under various elbow angles are employed to construct a gain mapping matrix for system control. Co-activation within extensor and flexor can increase the stiffness of elbow joint and thus stabilize the motion of elbow. Therefore, in the control system, a nonlinear damping that has a physiological rationale is adopted to simulate the effect of co-activation. The coefficient of the nonlinear damping is determined by summing EMG signals of triceps and biceps. Since the wave form of control signals (i.e., EMG signals) resembles Gaussian distribution, the motor outputs a non-smooth torque trajectory to elbow joint which makes the subjects hard to accept the control system. Hence for obtaining a smooth torque trajectory, an adaptive filter is employed to automatically tune the bandwidth of the man-machine control system to within a permissible range. Two sets of experiments are performed. In the first set the subjects are asked to move their forearm sgainst to a constant load from point to point while they follow a trajectory on the monitor. In the second set, the subjects are asked to perform a lift-hold-depose-hold movement against to a constant load too. Statistical analyses of the experiment results revealed the external torque can significantly improve the muscle power but cannot influence the tracking performance and nonlinear damping combined with the adaptive filter can stabilize the man-machine system and yield a much smoother movement.

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Books on the topic "Elbow movement"

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At the elbows of my elders: One family's journey toward civil rights. St. Louis: Missouri History Museum, 2008.

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Salama, Amir, and Amjid Ali. Clinical evaluation of elective problems in the adult elbow. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199550647.003.05.01.

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Hafez, Daniel, Adam Bevan, and Wilson Z. Ray. Nerve Transfers for Spinal Cord Injury. Edited by Meghan E. Lark, Nasa Fujihara, and Kevin C. Chung. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190617127.003.0029.

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In spinal cord injury, nerve transfers represent a potential adjunct in the comprehensive clinical management of patients. Unlike tendon transfers, nerve transfers preserve the native muscle biomechanics and provide greater than a 1:1 functional exchange. Nerve transfers can provide improved upper extremity function by capitalizing on the preserved upper motor neurons below the zone of spinal cord injury. One goal in reconstruction is to restore movement. Major movements that have been targeted for restoration include elbow extension (to allow the patient to assist in transfers) and pinch, grasp, and release, which can aid in controlling a motorized wheelchair as well as in feeding oneself. Other major goals are restoration of hand sensation and diaphragm reinnervation to allow ventilator weaning and spontaneous respiration.

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An electromyographical study comparing two methods of inducing muscle hypertrophy in the upper arm. 1988.

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An electromyographical study comparing two methods of inducing muscle hypertrophy in the upper arm. 1988.

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An electromyographical study comparing two methods of inducing muscle hypertrophy in the upper arm. 1988.

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An electromyographical study comparing two methods of inducing muscle hypertrophy in the upper arm. 1988.

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Book chapters on the topic "Elbow movement"

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Anderson, Mark W., and Christine B. Chung. "Elbow Imaging with an Emphasis on MRI." In IDKD Springer Series, 23–39. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71281-5_3.

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AbstractThe elbow is a complex joint made up of three separate articulations within a common capsule. The proximal ulna articulates with the trochlea and functions as a hinge joint, while the proximal radioulnar joint provides for rotational movement of the forearm. The radiocapitellar joint allows for both hinge and rotational movements. Together, these allow for flexion and extension of the arm and, in conjunction with the distal radioulnar joint at the wrist, pronation and supination as well.

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Joseph, Benjamin. "Deformities and Limitation of Movement of the Elbow." In Paediatric Orthopaedic Diagnosis, 269–78. New Delhi: Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2392-4_27.

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Borelli, Giovanni Alfonso. "On the motive power and on the moments of the flexor muscles of the elbow." In On the Movement of Animals, 28–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-73812-8_11.

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Moradi, Hadi, and Sukhan Lee. "Joint Limit Analysis and Elbow Movement Minimization for Redundant Manipulators Using Closed Form Method." In Lecture Notes in Computer Science, 423–32. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11538356_44.

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Hou, Jiateng, Yingfei Sun, Lixin Sun, Bingyu Pan, Zhipei Huang, and Jiankang Wu. "Voluntary EMG-to-Force Estimation in Shoulder and Elbow During the Movement of Feeding Oneself." In Internet of Things, 423–34. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02819-0_32.

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Silva, Alexsandro S. T., Antonio Maricio F. L. Miranda de Sá, and Carlos Julio Tierra-Criollo. "Functional Connectivity during Elbow Movements: Comparison between Motor and Non-motor Task." In IFMBE Proceedings, 938–41. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-11128-5_233.

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Xiloyannis, M., L. Cappello, B. Khanh Dinh, C. W. Antuvan, and L. Masia. "Design and Preliminary Testing of a Soft Exosuit for Assisting Elbow Movements and Hand Grasping." In Converging Clinical and Engineering Research on Neurorehabilitation II, 557–61. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-46669-9_92.

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Inbar, Gideon F. "Estimation of Human Elbow Joint Mechanical Transfer Function during Steady State and during Cyclical Movements." In Advances in Processing and Pattern Analysis of Biological Signals, 375–90. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4757-9098-6_25.

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Kadivar, Zahra, Christopher E. Beck, Roger N. Rovekamp, Marcia K. O’Malley, and Charles A. Joyce. "On the Efficacy of Isolating Shoulder and Elbow Movements with a Soft, Portable, and Wearable Robotic Device." In Biosystems & Biorobotics, 89–93. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-46532-6_15.

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Rohwedder, Thomas. "Biomechanics of the Canine Elbow Joint." In Veterinary Medicine and Science. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99569.

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The canine elbow joint is a complex joint, whose musculoskeletal anatomy is well investigated. During the last 30 years kinematic analysis has gained importance in veterinary research and kinematics of the healthy and medial coronoid disease affected canine elbow joint are progressively investigated. Video-kinematographic analysis represents the most commonly used technique and multiple studies have investigated the range of motion, angular velocity, duration of swing and stance phase, stride length and other kinematic parameters, mostly in the sagittal plane only. However, this technique is more error-prone and data gained by video-kinematography represent the kinematics of the whole limb including the soft tissue envelope. A more precise evaluation of the in vivo bone and joint movement can only been achieved using fluoroscopic kinematography. Based on recent studies significant differences in the motion pattern between healthy joints and elbows with medial coronoid disease could be detected. Thereby not only adaptive changes, caused by pain and lameness, could be described, but primary changes in the micromotion of the joint forming bones could be found, which potentially represent new factors in the pathogenesis of medial coronoid disease. This chapter gives a review of current literature on elbow joint kinematics, with particular focus onto pathologic biomechanics in dysplastic canine elbows.

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Conference papers on the topic "Elbow movement"

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Chen, Kai, and Richard A. Foulds. "The Mechanics of Perturbed Upper Limb Movement Control." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-37201.

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The dependence of muscle force on muscle length gives rise to a “spring - like” behavior which has been shown to play an important role during movement. This study extended this concept and incorporated the influential factors of the mechanical behavior of the neural, muscular and skeletal system on the control of elbow movement. A significant question in motor control is determining how information about movement is used to modify control signals to achieve desired performance. One theory proposed and supported by Feldman et. is the equilibrium point hypothesis (EPH). In it the central nervous system (CNS) reacts to movement as a shift of the limb’s equilibrium posture. The EPH drastically simplified the requisite computations for multi-joint movements and mechanical interactions with complex dynamic objects in the context. Because the neuromuscular system is spring-like, the instantaneous difference between the arm’s actual position and the equilibrium position specified by the neural activity can generate the requisite torques, avoiding the complex “inverse dynamic” of computing the torques at the joints. Moreover, this instantaneous difference serves as a potential source of movement control related to limb dynamics and associated movement-dependent torques when perturbations are added. In this paper, we have used an EPH model to examine changes to control signals for arm movements in the context of adding perturbations in format of forces or torques. The mechanical properties and reflex actions of muscles crossing the elbow joint were examined during a planned 1 radian voluntary elbow flexion movement. Brief unexpected torque/force pulses of identical magnitude and time duration (4.5 N flexion switching to 50 N extension within 120ms) were introduced at various points of a movement in randomly selected trials. Single perturbation was implemented in different trials during early, mid, stages of the movement by pre-programmed 6DOF robotic arm (MOOG FCS HapticMaster). Changes in movement trajectory induced by a torque/ force perturbation determined over the first 120 ms by a position prediction formulation, and then a modified and optimization K-B-I (stiffness-damping-inertia) model was fit to the responses for predicting both non-perturbed and perturbed movement of elbow. The stiffness and damping coefficients estimate during voluntary movements were compared to values recorded of different subjects during trials. A least square nonlinear optimization model was designed to help determine the optimized impedance a subject could generate, and the identified of adapted of K-B-I in perturbed upper limb movements confirmed our assumption.

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Celik, Ozkan, and Marcia K. O'Malley. "A neuromuscular elbow model for analysis of force and movement variability in slow movements." In 2011 33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2011. http://dx.doi.org/10.1109/iembs.2011.6092038.

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Ketteringham, Laurence P., Simon A. Neild, Rick A. Hyde, Rosie J. S. Jones, and Angela Davies Smith. "Intention Tremor in Multiple Sclerosis: Measuring and Modelling Arm Dynamics and Elbow Torque." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66140.

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This paper reports on a project to measure and control tremor in individuals with multiple sclerosis (MS). It discusses systems for measuring and modelling upper limb movements and intention tremor, together with initial movement measurement and torque modelling data. The system uses microelectromechanical systems (MEMS) sensors to measure movements of the upper limb representative of everyday tasks. Surface electromyogram (EMG) measurements are taken simultaneously to provide gross muscle activity data. A dynamic model is used to simulate the movements, allowing particular sites to be studied in detail. Initial movement data is presented, comparing analysed EMG data and torque estimated by the dynamic model around the elbow joint. Despite the simple analysis, a good fit was obtained. The dynamic model includes a neuromuscular modelling system which will be used in future work to simulate the interactions between measured movements containing intention tremor and the intention behind them, allowing better understanding of the tremor and creating better descriptions of the tremor. Future work will use measured data and modelling to develop methods of attenuating intention tremor, by providing real-time feedback control of tremor reduction devices, without adversely affecting the underlying intended movement.

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Mukaimachi, Norihiko, Fumio Ando, and Masatoshi Ikeda. "An Advanced Computational Method for Nonlinear Behavior of Piping Systems Subject to Earthquake Load." In ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1406.

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With regard to piping systems of industrial facilities, sometimes they are subject to large deformation with high local plasticity. This results mainly from the detrimental ground movement due to possible liquefaction near seaside when a strong earthquake occurs. Especially the high local plasticity concentrates on elbows (bends) in piping systems. In this paper, the elbow behaviors of in-plane (closing: deflection to decrease elbow radius of curvature and opening: deflection to increase its radius of curvature) and out-of-plane bending are analyzed in a large plastic range using Nonlinear Finite Element Method (FEM) with the shell elements of material and geometrical nonlinear characteristics. The flexibility factor of elbows depends on flexibility characteristics, angular distortion and yield stress of material. Thus, in order to estimate the behaviors of piping systems with large plasticity at elbow by a simplified method, the modified flexibility factor method is introduced from results of FEM. Calculation results obtained using the simplified method are compared with experimental results, and this method gives an index to assess behaviors of piping systems subject to extremely large movement of supports. It is also possible to estimate local plasticity at elbows in piping systems by this conventional analysis.

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Rahman, M. M., M. H. Rahman, and R. Ikeura. "Impedance Characteristic of Shoulder and Elbow Joints during Passive Movement." In 2006 International Conference on Industrial and Information Systems. IEEE, 2006. http://dx.doi.org/10.1109/iciinfs.2006.347155.

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Suplino, L. O., G. C. de Melo, G. S. Umemura, and A. Forner-Cordero. "Elbow movement estimation based on EMG with NARX Neural Networks." In 2020 42nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) in conjunction with the 43rd Annual Conference of the Canadian Medical and Biological Engineering Society. IEEE, 2020. http://dx.doi.org/10.1109/embc44109.2020.9176129.

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Veslin, E. Y., M. S. Dutra, L. Bevilacqua, L. S. C. Raptopoulos, W. S. Andrade, and J. G. M. Soares. "Decoding elbow movement with Kalman Filter using non-invasive EEG." In 2019 IEEE Colombian Conference on Applications in Computational Intelligence (ColCACI). IEEE, 2019. http://dx.doi.org/10.1109/colcaci.2019.8781800.

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Rahman, M. M., M. H. Rahman, and R. Ikeura. "Impedance Characteristic of Shoulder and Elbow Joints during Passive Movement." In First International Conference on Industrial and Information Systems. IEEE, 2006. http://dx.doi.org/10.1109/iciis.2006.365729.

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Chen, Kai, and Richard Foulds. "Optimization of Stiffness and Damping in Modeling of Voluntary Elbow Flexions." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62219.

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A subsequent study of obstructed voluntary arm movement extended the relative damping concept, and incorporated the influential factors of the mechanical behavior of the neural, muscular and skeletal system in the control and coordination of arm posture and movement. A significant problem of the study is how this information should be used to modify control signals to achieve desired performance. This study used an Equilibrium Point Hypothesis (EPH) model to examine changes of controlling signals for arm movements in the context of adding perturbation/load in the form of forces/torques. The mechanical properties and reflex actions of muscles of the elbow joint were examined. Brief unexpected torque/force pulses of identical magnitude and time duration were introduced at different stages of the movement in a random order by a pre-programmed 3 degree of freedom (DOF) robotic arm (MOOG FCS HapticMaster). Key to this research is the optimization of B and K for each subject based on their HM only experimental data. The results shown in each of sections confirm that those parameters. Along with an EMG determined VT can be used successfully to model the perturbed trials. The results also show that the subjects may maintain the same control parameters (virtual trajectory, stiffness and damping) regardless of added perturbations that cause substantial changes in EMG activity and kinematics.

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Veslin, Elkin, Max Suell Dutra, Luiz Bevilacqua, Luciano Santos Constantin Raptopoulos, Waltencir Andrade, Rafael da Silva Figueiredo, and Juliana Guimarães Martins Soares. "DECODING IMAGINARY ELBOW MOVEMENT WITH KALMAN FILTER USING NON-INVASIVE EEG." In 25th International Congress of Mechanical Engineering. ABCM, 2019. http://dx.doi.org/10.26678/abcm.cobem2019.cob2019-0061.

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