Academic literature on the topic 'Unimanual/ bimanual'
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Journal articles on the topic "Unimanual/ bimanual"
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Yokoi, Atsushi, Wenjun Bai, and Jörn Diedrichsen. "Restricted transfer of learning between unimanual and bimanual finger sequences." Journal of Neurophysiology 117, no. 3 (2017): 1043–51. http://dx.doi.org/10.1152/jn.00387.2016.
Full textAbstract:
When training bimanual skills, such as playing piano, people sometimes practice each hand separately and at a later stage combine the movements of the two hands. This poses the critical question of whether motor skills can be acquired by separately practicing each subcomponent or should be trained as a whole. In the present study, we addressed this question by training human subjects for 4 days in a unimanual or bimanual version of the discrete sequence production task. Both groups were then tested on trained and untrained sequences on both unimanual and bimanual versions of the task. Surprisingly, we found no evidence of transfer from trained unimanual to bimanual or from trained bimanual to unimanual sequences. In half the participants, we also investigated whether cuing the sequences on the left and right hand with unique letters would change transfer. With these cues, untrained sequences that shared some components with the trained sequences were performed more quickly than sequences that did not. However, the amount of this transfer was limited to ∼10% of the overall sequence-specific learning gains. These results suggest that unimanual and bimanual sequences are learned in separate representations. Making participants aware of the interrelationship between sequences can induce some transferrable component, although the main component of the skill remains unique to unimanual or bimanual execution. NEW & NOTEWORTHY Studies in reaching movement demonstrated that approximately half of motor learning can transfer across unimanual and bimanual contexts, suggesting that neural representations for unimanual and bimanual movements are fairly overlapping at the level of elementary movement. In this study, we show that little or no transfer occurred across unimanual and bimanual sequential finger movements. This result suggests that bimanual sequences are represented at a level of the motor hierarchy that integrates movements of both hands.
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Lin, Qiang, Hai Li, Yu-Rong Mao, et al. "The Difference of Neural Networks between Bimanual Antiphase and In-Phase Upper Limb Movements: A Preliminary Functional Magnetic Resonance Imaging Study." Behavioural Neurology 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/8041962.
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Most daily movements require some degree of collaboration between the upper limbs. The neural mechanisms are bimanual-condition specific and therefore should be different between different activities. In this study, we aimed to explore intraregional activation and interregional connectivity during bimanual movement by functional magnetic resonance imaging (fMRI). Ten right-handed, normal subjects were recruited. The neural correlates of unimanual (right side) and bimanual (in-phase and antiphase) upper limb movements were investigated. Connectivity analyses were carried out using the psychophysiological interaction (PPI) model. The cerebellum was strongly activated in both unimanual and bimanual movements, and the cingulate motor area (CMA) was the most activated brain area in antiphase bimanual movement. Moreover, compared with unimanual movement, CMA activation was also observed in antiphase bimanual movement, but not in in-phase bimanual movement. In addition, we carried out the PPI model to study the differences of effective connectivity and found that the cerebellum was more connected with the CMA during antiphase bimanual movement than in-phase bimanual movement. Our findings elucidate the differences of the cerebellar-cerebral functional connectivity between antiphase and in-phase bimanual movements, which could be used to facilitate the development of a neuroscience perspective on bimanual movement control in patients with motor impairments.
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Ridderikhoff, Arne, C. (Lieke) E. Peper, and Peter J. Beek. "Unraveling Interlimb Interactions Underlying Bimanual Coordination." Journal of Neurophysiology 94, no. 5 (2005): 3112–25. http://dx.doi.org/10.1152/jn.01077.2004.
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Three sources of interlimb interactions have been postulated to underlie the stability characteristics of bimanual coordination but have never been evaluated in conjunction: integrated timing of feedforward control signals, phase entrainment by contralateral afference, and timing corrections based on the perceived error of relative phase. In this study, the relative contributions of these interactions were discerned through systematic comparisons of five tasks involving rhythmic flexion–extension movements about the wrist, performed bimanually (in-phase and antiphase coordination) or unimanually with or without comparable passive movements of the contralateral hand. The main findings were the following. 1) Contralateral passive movements during unimanual active movements induced phase entrainment to interlimb phasing of either 0° (in-phase) or 180° (antiphase). 2) Entrainment strength increased with the passive movements' amplitude, but was similar for in-phase and antiphase movements. 3) Coordination of unimanual active movements with passive movements of the contralateral hand (kinesthetic tracking) was characterized by similar bilateral EMG activity as observed in active bimanual coordination. 4) During kinesthetic tracking the timing of the movements of the active hand was modulated by afference-based error corrections, which were more pronounced during in-phase coordination. 5) Indications of in-phase coordination being more stable than antiphase coordination were most prominent during active bimanual coordination and marginal during kinesthetic tracking. Together the results indicated that phase entrainment by contralateral afference contributed equally to the stability of in-phase and antiphase coordination, and that differential stability of these patterns depended predominantly on integrated timing of feedforward signals, with only a minor role for afference-based error corrections.
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Donchin, O., A. Gribova, O. Steinberg, A. R. Mitz, H. Bergman, and E. Vaadia. "Single-Unit Activity Related to Bimanual Arm Movements in the Primary and Supplementary Motor Cortices." Journal of Neurophysiology 88, no. 6 (2002): 3498–517. http://dx.doi.org/10.1152/jn.00335.2001.
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Single units were recorded from the primary motor (MI) and supplementary motor (SMA) areas of Rhesus monkeys performing one-arm (unimanual) and two-arm (bimanual) proximal reaching tasks. During execution of the bimanual movements, the task related activity of about one-half the neurons in each area (MI: 129/232, SMA: 107/206) differed from the activity during similar displacements of one arm while the other was stationary. The bulk of this “bimanual-related” activity could not be explained by any linear combination of activities during unimanual reaching or by differences in kinematics or recorded EMG activity. The bimanual-related activity was relatively insensitive to trial-to-trial variations in muscular activity or arm kinematics. For example, trials where bimanual arm movements differed the most from their unimanual controls did not correspond to the ones where the largest bimanual neural effects were observed. Cortical localization established by using a mixture of surface landmarks, electromyographic recordings, microstimulation, and sensory testing suggests that the recorded neurons were not limited to areas specifically involved with postural muscles. By rejecting this range of alternative explanations, we conclude that neural activity in MI as well as SMA can reflect specialized cortical processing associated with bimanual movements.
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Heitger, Marcus H., Marc J. M. Macé, Jan Jastorff, Stephan P. Swinnen, and Guy A. Orban. "Cortical regions involved in the observation of bimanual actions." Journal of Neurophysiology 108, no. 9 (2012): 2594–611. http://dx.doi.org/10.1152/jn.00408.2012.
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Although we are beginning to understand how observed actions performed by conspecifics with a single hand are processed and how bimanual actions are controlled by the motor system, we know very little about the processing of observed bimanual actions. We used fMRI to compare the observation of bimanual manipulative actions with their unimanual components, relative to visual control conditions equalized for visual motion. Bimanual action observation did not activate any region specialized for processing visual signals related to this more elaborated action. On the contrary, observation of bimanual and unimanual actions activated similar occipito-temporal, parietal and premotor networks. However, whole-brain as well as region of interest (ROI) analyses revealed that this network functions differently under bimanual and unimanual conditions. Indeed, in bimanual conditions, activity in the network was overall more bilateral, especially in parietal cortex. In addition, ROI analyses indicated bilateral parietal activation patterns across hand conditions distinctly different from those at other levels of the action-observation network. These activation patterns suggest that while occipito-temporal and premotor levels are involved with processing the kinematics of the observed actions, the parietal cortex is more involved in the processing of static, postural aspects of the observed action. This study adds bimanual cooperation to the growing list of distinctions between parietal and premotor cortex regarding factors affecting visual processing of observed actions.
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Poitras, Isabelle, Jade Clouâtre, Alexandre Campeau-Lecours, and Catherine Mercier. "Accelerometry-Based Metrics to Evaluate the Relative Use of the More Affected Arm during Daily Activities in Adults Living with Cerebral Palsy." Sensors 22, no. 3 (2022): 1022. http://dx.doi.org/10.3390/s22031022.
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Adults living with cerebral palsy (CP) report bimanual and unimanual difficulties that interfere with their participation in activities of daily living (ADL). There is a lack of quantitative methods to assess the impact of these motor dysfunctions on the relative use of each arm. The objective of this study was to evaluate the concurrent and discriminative validity of accelerometry-based metrics when used to assess bimanual and unimanual functions. Methods: A group of control subjects and hemiplegic adults living with CP performed six ADL tasks, during which they were wearing an Actigraph GT9X on each wrist and being filmed. Four bimanual and unimanual metrics were calculated from both accelerometry-based and video-based data; these metrics were then compared to one other with an intraclass correlation coefficient (ICC). Some of these metrics were previously validated in other clinical population, while others were novel. The discriminative validity was assessed through comparisons between groups and between tasks. Results: The concurrent validity was considered as good to excellent (ICC = 0.61–0.97) depending on the experience of the raters. The tasks made it possible to discriminate between groups. Conclusion: The proposed accelerometry-based metrics are a promising tool to evaluate bimanual and unimanual functions in adults living with CP.
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Öttl, Anton, Jonathan D. Kim, Dawn M. Behne, Pascal Gygax, Jukka Hyönä, and Ute Gabriel. "Exploring the comparative adequacy of a unimanual and a bimanual stimulus-response setup for use with three-alternative choice response time tasks." PLOS ONE 18, no. 3 (2023): e0281377. http://dx.doi.org/10.1371/journal.pone.0281377.
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Research often conceptualises complex social factors as being distinct binary categories (e.g., female vs male, feminine vs masculine). While this can be appropriate, the addition of an ‘overlapping’ category (e.g., non-binary, gender neutral) can contextualise the ‘binary’, both for participants (allowing more complex conceptualisations of the categories than the ‘either/or’ conceptualisation in binary tasks), and for the results (by providing a neutral baseline for comparison). However, it is not clear what the best response setup for such a task would be. In this study, we explore this topic through comparing a unimanual (N = 34) and a bimanual response setup (N = 32) for use with a three-alternative choice response time task. Crucially, one of the stimulus categories (‘mixed’) was composed of stimulus elements from the other two stimulus categories used in that task (Complex Task). A reference button task was included to isolate the motoric component of response registration (Simple Task). The results of the simple task indicated lower motoric costs for the unimanual compared to the bimanual setup. However, when statistically controlling for these motoric costs in the complex task, the bimanual setup had a lower error rate and faster response times than the unimanual setup. Further, in the complex task error rates and response times were higher for the mixed than the matched stimuli, indicating that responding to mixed stimuli is more challenging for encoding and/or decision making processes. This difference was more pronounced in the unimanual than the bimanual setup. Taken together these results indicate that the unimanual setup is more adequate for the reference button task, whereas the intricacy of overlapping categories in the complex task is better contained in the bimanual setup, i.e. when some response alternatives are allocated to one hand and other alternatives to the other hand.
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Azaad, Shaheed, and Simon M. Laham. "Sidestepping spatial confounds in object-based correspondence effects: The Bimanual Affordance Task (BMAT)." Quarterly Journal of Experimental Psychology 72, no. 11 (2019): 2605–13. http://dx.doi.org/10.1177/1747021819852216.
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Tucker and Ellis found that when participants made left/right button-presses to indicate whether objects were upright or inverted, responses were faster when the response hand aligned with the task-irrelevant handle orientation of the object. The effect of handle orientation on response times has been interpreted as evidence that individuals perceive grasp affordances when viewing briefly presented objects, which in turn activate grasp-related motor systems. Although the effect of handle alignment has since been replicated, there remains doubt regarding the extent to which the effect is indeed driven by affordance perception. Objects that feature in affordance-compatibility paradigms are asymmetrical and have laterally protruding handles (e.g., mugs) and thus confound spatial and affordance properties. Research has attempted to disentangle spatial compatibility and affordance effects with varying results. In this study, we present a novel paradigm with which to study affordance perception while sidestepping spatial confounds. We use the Bimanual Affordance Task (BMAT) to test whether object affordances in symmetrical objects facilitate response times. Participants ( N = 36) used one of three (left unimanual/right unimanual/bimanual) responses to indicate the colour of presented objects. Objects afforded either a unimanual (e.g., handbag) or a bimanual (e.g., laundry hamper) grasp. Responses were faster when the afforded grasp corresponded with the response type (unimanual vs. bimanual), suggesting that affordance effects exist independent of spatial compatibility.
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Patel, Shivangi shaileshkumar, and Jahanvi barot. "Effect of Unimanual Versus Bimanual Training on Impairment, Disability and Quality of Life Among Post Stroke Individuals: A Comparative Study." International Journal of Physiotherapy and Research 12, no. 5 (2024): 4777–83. http://dx.doi.org/10.16965/ijpr.2024.124.
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Background: Stroke is a significant global health issue caused by sudden interruptions in blood flow to the brain, leading to neurological dysfunction that can result in ischemic or hemorrhagic conditions. Effective rehabilitation approaches, such as unilateral and bilateral training, play a vital role in restoring upper limb function and overall recovery through targeted neural adaptations. Evaluation tools like the (SIS) provide critical insights into post-stroke recovery and improvements in quality of life, underscoring the need for comprehensive care and early intervention in managing this complex medical condition. Aim: To find out the effectiveness of unimanual and bimanual training on impairment, disability, and quality of life among post stroke individuals. Study design: comparative study Method: Firstly, ethical clearance was taken from the committee for comparative study. Samples were collected by lottery allotment sampling method. Thirty participants were selected based on inclusion and exclusion criteria. The details of the treatment were explained and written consent was taken from the participants. Experimental group treated with unimanual training and bimanual training for 5 days a week for 4 weeks. Outcome measure: Stroke impact scale Results: Data was analysed using SPSS Version29. According to statistical analysis, improvement seen in group B compared to group A. Conclusions: Bimanual training showed greater effective in impairment, disability and quality of life compared to unimanual training. KEYWORDS: Bimanual training, Unimanual training, stroke impact scale, quality of life, stroke.
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Panday, Virjanand, Wouter M. Bergmann Tiest, and Astrid M. L. Kappers. "Bimanual and unimanual length perception." Experimental Brain Research 232, no. 9 (2014): 2827–33. http://dx.doi.org/10.1007/s00221-014-3974-1.
Full textDissertations / Theses on the topic "Unimanual/ bimanual"
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Dowell, Catherine Jane. "Unimanual and Bimanual Haptic Shape Discrimination." TopSCHOLAR®, 2018. https://digitalcommons.wku.edu/theses/2074.
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In the current study 24 younger adults and 24 older adults haptically discriminated natural 3-D shapes (bell peppers, Capsicum annuum) using unimanual (one hand used to explore two objects) and bimanual (both hands used, but each hand explored separate objects) successive exploration. Haptic exploration using just one hand requires somatosensory processing in only one cerebral hemisphere (the hemisphere contralateral to the hand being used), while bimanual haptic exploration requires somatosensory processing in both hemispheres. Previous studies related to curvature/shape perception have found either an advantage for unimanual exploration over bimanual exploration or no difference between the two conditions. In contrast to the results of previous studies that found an advantage for unimanual exploration, the current study found that unimanual and bimanual haptic exploration produced equivalent shape discrimination performance. The current results also document a significant effect of age on haptic shape discrimination: older adults exhibited moderately reduced shape discrimination performance compared to younger adults, regardless of the mode of exploration (unimanual or bimanual).
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GALOFARO, ELISA. "Position sense and force control: assessment in unimanual and bimanual tasks." Doctoral thesis, Università degli studi di Genova, 2021. http://hdl.handle.net/11567/1046283.
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Human-environment interactions are common natural occurrences affecting every action. The environment includes objects whose manipulation requires careful somatosensory integration. For successful manipulation, the nervous system must be able to represent and predict the geometrical and mechanical features of sensory stimuli arising from the interaction with objects. These interactions involve sensory perturbations that must be predicted and compensated by the nervous system. Despite the importance of somatosensory integration, a comprehensive understanding of how the unimpaired sensory-motor system integrates information on force and position remains elusive.
Over the last decades, the evolution of technology has allowed researchers to develop highly controllable settings for evaluating sensory-motor integration and delivering haptic feedback. However, most of the existing haptic setups consist of systems with limited workspace and reduced-force capabilities. Recent advancements in exoskeleton devices provide a framework for developing haptic setups adequate to cover the full-human range of motion and offer a wide range of force and torque. Moreover, considering the prevalence of real-life activities involving two hands, bimanual control should be implemented and integrated in virtual reality and haptic interfaces.
The aim of my thesis project was to understand proprioception and force control in unimanual tasks and extend from that to bimanual and multi-joint tasks. To do this, I developed six setups (three unimanual and three bimanual), which progressively increased the complexity of the technologies employed and the human movements examined, to investigate motor strategies in unimpaired subjects. In the first unimanual setup, I enrolled 36 subjects to study with a planar manipulandum how subjects control the contact force exerted by their dominant arm in predictable (known arm position) and unpredictable (unknown arm position) environments. I was surprised to observe that contact forces can be precisely controlled with variable contact impedance, that is, without a persistent relation between applied force and resulting motion. In the second unimanual task, I investigated how proprioception of wrist position is affected by different types of kinesthetic perturbations of multi-joint arm movements. I enrolled 18 healthy subjects employing a 3-DoFs wrist device. Results evidenced important findings that should also be considered in the clinical evaluation of neurological patients: testing patients’ proprioception in a configuration that is close to the joints’ physiological workspace limits may increase mechanoreceptors excitation and provide a fine measurement of sensory acuity. Finally, in the third unimanual setup, since the proprioception involving the concurrent evaluation of proximal and distal multi-joint (more than a single DoF) upper limbs movements remained an open question, I evaluated 18 healthy participants wearing a robotic exoskeleton. Even in this application, results have relevance to common clinical practice: standard proprioceptive tests are manually dispensed by the therapists, the use of similar wearable technologies that contemplate a multi‐joint and 3D-space evaluation could drastically improve measurement accuracy and reliability.
Regarding the bimanual studies, in the first one, I evaluated 12 young participants controlling position and force while orienting an object with both hands. To approximate a scenario common to daily living activities, I designed an instrumented stand-alone device and implemented a coupled task oriented to assess bimanual proprioception. Results showed how much the perception of one's body in space affects the proprioceptive acuity for targets near to or far from the body. Proper changes in the evaluation protocol suggest the possible use in the clinical practice of such low-cost instrumentation. The same device was employed even in the second setup. In this case, it was opportunely fixed to make the task decoupled and used to evaluate the bimanual coordination in isometric force control. Compared to other studies, investigating the sole fingers’ contribution, here I considered the full arm by involving both proximal and distal muscles. Two populations were evaluated: young and elderly subjects. The inclusion of elderly subjects introduces insights about the deterioration of human abilities including higher asymmetry, lower accuracy, and more variable performance. Even this setup, appropriately modulated, may be adopted by therapists to evaluate neurological patients. Finally, with the third setup, I designed a task in which subjects performed multi-joint upper limb reaching movements in 3D-space while manipulating a virtual object with variable compliances, i.e., that should handle with less/more care. I re-programmed a bimanual robotic exoskeleton to provide several forms of haptic feedback. I tested the potentiality and the system stability on 15 healthy subjects of this new technology to evaluate motor strategies in the presence of simulated objects capable of reproducing more or less deformable materials. This last application provides a fully-customized environment that should be introduced even in rehabilitative applications requiring the bimanual control of concurrent position and force sense while haptic feedback is provided.
Accurately assessing proprioceptive deficits can complement regular therapy to better predict the recovery path. Moreover, bimanual haptic interfaces could provide solutions to clinical evaluation or motor recovery treatment of patients with neurological damages, increasing the efficiency of training and reducing the amount of individual attention needed from the clinician.
My outcomes on healthy subjects denote the potentialities of the designed and/or implemented device, tasks, and haptic interface. In particular, they denote a starting point for fully customized environments which could have implications for several assessment or rehabilitative interventions in patients with neurological diseases.
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Teku, Faven. "Investigating the Cortical and Subcortical Contributions to Unimanual and Bimanual Wrist Extension." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42017.
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When exploring movement production, motor control researchers have been interested in investigating the relative contributions to different types of movement. In a research setting, a startling acoustic stimulus (SAS) can be used as a tool to explore the neural processes that are occurring when preparing and initiating a movement. Additionally, suprathreshold TMS is another tool which can induce a suppression of the cortical region of the brain, resulting in RT delays which provides us with the ability to assess the corticospinal contributions to a particular movement. The aim of the current study was to investigate potential differences in the planning and execution of bimanual versus unimanual wrist extension movements. It was of particular interest as to whether bimanual coupling occurs at the cortical level or in lower parts of the output pathway (reticulospinal). Participants (N=6) were instructed to complete a unimanual or bimanual wrist extension following a control go-signal or a SAS. For subset of trials, in order to explore the level of corticospinal excitability of the movement, suprathreshold TMS was applied
over the left M1 during the task to induce a cortical silent period (CSP). Results revealed that theimpact of TMS on response initiation was not significantly different for unimanual task versus a bimanual task. Furthermore, the SP (silent period) only had an impact on the right limb and not the left during the bilateral task. Lastly, SAS did lead to shorter RTs for both the unimanual and bimanual wrist extension task, but the RT delay induced by TMS in the right limb was not shorter in SAS trials compared to control. The findings of the present study suggest that
bimanual coupling may be occurring at the cortical level and in lower parts of the output pathway as there may be correlated neural activity in the two hemispheres occurring during bimanual wrist extension movements.
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Faulkner, Deborah. "Asymmetries in unimanual and bimanual coordination : evidence from behavioural and transcranial magnetic stimulation studies." University of Western Australia. School of Psychology, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0048.
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The issue of the laterality of control during unimanual and bimanual coordination was addressed in this thesis. Two tasks were used throughout: a repetitive discrete response task (finger tapping) and a continuous task (circle-drawing). Different mechanisms have been implicated in the temporal control of repetitive discrete movements and continuous movements. The tasks also differ in the degree of spatiotemporal coordination required which might have important implications in the question of laterality of control. The first section of the thesis examined between-hand differences in the dynamics of performance during unimanual and bimanual coordination. During tapping, the dominant hand was faster and less temporally variable than the nondominant hand. During circle drawing the dominant hand was faster, more accurate, less temporally and spatially variable, and produced smoother trajectories than the nondominant hand. During bimanual coordination, several of these asymmetries were attenuated: the rate of movement of the two hands became equivalent (the hands became temporally coupled), the asymmetry in temporal variability during tapping was reduced, and the asymmetry in trajectory smoothness during circle drawing was reduced. The second section of the thesis examined the effects of disrupting motor processes with transcranial magnetic stimulation (TMS) over the left or right primary motor cortex (M1) on the ongoing performance of the hands. In the first study, TMS over left or right M1 during unimanual tapping caused large disruptions to tapping with the contralateral hand but had little effect on the ipsilateral hand. In contrast, for a subset of trials during bimanual tapping, two lateralized effects of stimulation were seen: the effect of TMS on the contralateral hand was greater after stimulation over left M1 than after stimulation over right M1, and prolonged changes in inter-tap interval were observed in the left hand regardless of the side of stimulation. In the second study, TMS over left M1 during circle drawing decreased the accuracy of drawing with both the contralateral and ipsilateral hand, whereas TMS over right M1 decreased accuracy of drawing only with the contralateral hand. This lateralized effect was not limited to the bimanual case, but was also apparent during unimanual drawing. The final chapter addressed issues in bimanual motor control after unilateral stroke. Performance of the affected limb was examined during unimanual and bimanual coordination in a group of stroke patients with varying levels of impairment. The results indicated an improvement in the performance of the affected limb for some patients with mild to moderate, but not severe upper limb motor deficits during bimanual movement. The improvements were limited to the patients who showed evidence of temporal coupling between the hands. These findings support the hypothesis that the dominant motor cortex has a role in the control of both hands during bimanual coordination. In addition, the dominant hemisphere appears to play a role in controlling both hands during unimanual movements which require a greater degree of spatiotemporal coordination. The final study suggests that temporal coupling between the limbs is crucial for the facilitation of performance of the affected limb during bimanual coordination, which has both theoretical and practical implications.
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Nasr, Marwa Hamdy Mohammed Elsayed. "The influence of biomodal and spatially co-incidental sensory information on the performance of unimanual and bimanual skills in children with and without celebral palsy." Thesis, University of Leeds, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.588757.
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The present thesis consisted of four studies to investigate the influence of using bimodal stimuli on aiming, unimanual and bimanual prehesion skills in children. Employing auditory and visual stimuli that are spatially and temporally co-incidental shown within the present studies provides bimodal stimuli that were known so far for enhancing sensory information. Reach to touch, and reach to grasp were examined in fourteen children with cerebral palsy (CP) and eleven of their typically developing peers (TD). 3D kinematic analyses was used to capture the aiming movement of participants while they were presented with either auditory (pure-tone sound/broadband sound), visual (light only) for '"! 'h~'" ~')I' unimodal conditions, or as a combined visual -auditory stimulus for bimodal conditions in a randomised order. Unimanual and bimanual prehension (congruent vs. incongruent) were also investigated. The data revealed group differences in the integration of bimodal stimuli that were characterised by reduction in participant reaction time for the TD children but not the CP children. Unimanual and bimanual reaching and grasping skills were influenced in both groups as shown from velocity profiles, kinematic landmarks and inter limb coupling. Results showed that enhancing the environment with sound and light resulted in more controlled and coordinated movements for both groups of children.
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Araújo, José Pedro Ferreira. "From unimanual to bimanual manipulation in the anthropomorphic robot ARoS." Master's thesis, 2013. http://hdl.handle.net/1822/41932.
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Dissertação de mestrado integrado em Engenharia Electrónica Industrial e Computadores<br>The field of anthropomorphic robotics is unanimously recognized as one of the major challenges of current robotics. The reason is due to the fact that anthropomorphic robots are expected to co-exist and work cooperatively with human users in everyday environments where they may be needed. It is known that social human-robot interaction, as well as physical communication is easier if the robot has human form and behave similarly to human beings (Fong et al., 2002; Duffy; 2003; Schaal, 2007). This implies that the robot should possess cognition and human movements.
Considering that the majority of daily tasks and objects require bimanual manipulation (e.g. carry a tray, open a suitcase, cut bread), it is of outmost importance that humanoid robots are capable of cooperatively use both arms. Such tasks could either be performed by the robot itself or in collaboration with a human user.
Taking this significant need into consideration, this master thesis entitled “From unimanual to bimanual manipulation in the anthropomorphic robot ARoS” emerges, also integrating the European project PF7 Marie Curie "NETT - Neural Engineering Transformative Technologies". The main goal of this master project is to design a real-time optimized movement planning for unimanual motions. Only afterwards it will be possible the planning and control system design for bimanual movements for au anthropomorphic robotic system with humanlike movement. This research project is under development at the Mobile and Anthropomorphic Robotics Laboratory (MARLab) of the Department of Industrial Electronics and the Algoritmi Center at the University of Minho (Campus Azurém).
With the intent of ease the interaction between the human user and the robot, and to increase the number of tasks that the robot can perform alone, it is necessary to add a second arm, which will reduce limitations and open a new range of possibilities and bimanual applications. To coordinate two robotic arms with the main goal of executing a task in an independent or cooperative manner has been considered an enormous challenge in the development of personal robots. Some reasons for this perspective are mainly the elevated number of degrees of freedom (DOF) in the robotic arms that must be controlled, the unpredictability of daily tasks and the need to have a real-time system.
The advantages of a robot capable of executing bimanual tasks are very alluring, the main are highlighted bellow:
• The increase of range in applications. The second arm can hold an object while the other arm is in action, this will increase the capabilities of the robot in helping the human;
• The increase of the robot's workspace (e.g. An object might be out of range of one arm and within range to the second one)
• The increase of speed to which the task is executed.
Since the main goal is to be able to produce a practical and highly adaptable solution, the effort is being applied in order to have no pre-programmed movements in both robotic arms. Service robots in very dynamic environments should not be pre-programmed, therefore it will be possible to have a solution that is able to act after reading its surroundings and be directly adapted. It is extremely important the usage of such specific platforms to enlarge the knowledge in this exciting area and conclude with the improvement of humanity life quality. Simulations and tests were conducted in two different scenarios named has "Toy-Vehicle" and "Space-Station". The results suggest that the above referred objectives and premises were accomplished, such has: i) Human-like movement, ii) Real-time planning and execution, iii) easy adaptation to dynamical scenarios cluttered with obstacles.<br>A área da robótica antropomórfica é unanimemente reconhecida como um dos grandes desafios da robótica atual. Tal deve-se ao facto de que se pretende que os robôs antropomórficos coexistam e trabalhem em cooperação com os utilizadores humanos em todos os ambientes em que estes possam ser necessários. Sabe-se que a interação social humano-robô, bem como a comunicação física é facilitada se o robô possuir forma humana e se comportar de forma semelhante aos humanos (Fong et al., 2002; Duffy, 2003; Schaal, 2007). Isto implica que o robô possua cognição e movimentos humanos (human like).
Considerando que a maioria das tarefas do dia-a-dia exigem manipulação bimanual (e.g. carregar uma bandeja, abrir uma mala, cortar pão), é importante que os robôs humanóides sejam capazes de cooperar com o humano utilizando ambos os braços. Tais tarefas podem ser realizadas pelo robô de forma independente ou em colaboração com o parceiro humano.
Tendo esta necessidade em consideração, foi proposto este projeto de mestrado intitulada "De Manipulação Unimanual para Bimanual no Robô Antropomórfico ARoS", integrado no projecto europeu PF7 Marie Curie" NETT - Neural Engineering Transformative Technologies".
O sistema robótico antropomórfico desenvolvido irá interagir com um parceiro humano, sendo capaz de, não só executar tarefas que o utilizador humano não é capaz de realizar devido a algum tipo de incapacidade, mas também, quando é vantajoso cooperar com o parceiro humano em diferentes tipos de situações (e.g. manipular uma garrafa, passá-la de uma mão para a outra e entregá-la ao humano).
Na anterior versão do ARoS vários problemas e limitações relacionados com interação entre o robô e o utilizador humano, surgiram devido ao fato de que esta versão da plataforma robótica exibia apenas um manipulador.
Para facilitar a interação entre o utilizador humano e o ARoS, bem como para aumentar o número de tarefas que o robô pode executar autonomamente, tornou-se claro que a adição de um segundo braço robótico iria reduzir limitações do sistema robótico e tornar possível uma série de novas aplicações bimanuais. Coordenar dois braços robóticos com o objetivo de executar tarefas de forma independente ou cooperativa é considerado um grande desafio no desenvolvimento de robôs pessoais. Algumas das razões que suportam esta perspectiva estão relacionadas com o elevado número de graus de liberdade (DOF) que braços robóticos antropomórficos possuem. Note-se também que a imprevisibilidade das tarefas do dia-a-dia dão ênfase à necessidade de se obter um sistema capaz de planear o movimento de ambos os braços em tempo real.
As vantagens de um robô capaz de executar tarefas bimanuais são por demais aliciantes entre as quais, pode ser destacadas as seguintes:
• O aumento da gama de aplicações. Um braço pode segurar num objeto, enquanto que o outro está a executar a ação relativamente ao primeiro, permitindo assim o aumento das possíveis aplicações do robô enquanto ajudante.
• O aumento do espaço de, trabalho do robô (e.g. um objeto pode estar fora do alcance de um braço e dentro do alcance do outro braço)
• O aumento da velocidade com que a tarefa é executada.
Uma vez que se pretende obter uma solução adaptável, o projeto foi conduzido no sentido de não possuir movimentos pré-programado em ambos os braços robóticos. Esta premissa trará vantagens quando o ARoS for testado em ambientes dinâmicos onde os objetos não têem uma posição fixa, obtendo-se assim um sistema robótico capaz de se adaptar a mudanças na sua área de trabalho. Foram feitas simulações e testes em dois cenários distintos "Construção de um brinquedo" (Toy Vehicle) e "Estação Espacial" (Space-Station) com resultados que comprovam as premissas acima descritas, tais como: 1) movimento idêntico ao do humano, ii) planeamento em tempo real, iii) adaptação a mudanças no meio, em ambientes com um elevado número de obstaculos.
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Lee-Miller, Trevor. "Transfer and Generalization of Learned Manipulation between Unimanual and Bimanual Tasks." Thesis, 2020. https://doi.org/10.7916/d8-6v10-ae58.
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Successful grasping and dexterous object manipulation relies on the ability to form internal representations of object properties that can be used to control digit kinetics and kinematics. Sensory cues and sensorimotor experience enable the updating of these internal representations. Aside from the weight of the object, the center of mass of the object results in object torque that needs to be represented and compensated for. In order to counter object torque, digit forces and centers of pressure are modulated to generate a compensatory moment to prevent object roll. Generalization studies can be used to examine whether this learning is represented on a low effector-specific level or a high task-specific level. Previous studies have shown that the internal representation of object torque does not generalize after object rotation or contralateral hand switch suggesting an effector level of representation. However, it has been shown that switching from two to three digits and vice versa does lead to full generalization suggesting a high level representation in certain circumstances. Thus, an understanding of whether learned manipulation would generalize when adding or removing the number of degrees of freedom and effectors would provide more information on these levels of representation. We asked 30 participants to lift a visual symmetrical object with an asymmetrical center of mass. Participants lifted the object 10 times in one grasp type (right hand unimanual, bimanual, or left hand unimanual). Following that, they switched to another grasp type and lifted the object another 10 times. Through various different orders of these transfer blocks, we examined their ability to generalize between unimanual and bimanual grasping by comparing the pre- and post-transfer trials. Our results show the partial generalization of learned manipulation when switching between unimanual and bimanual grasps. This is shown from the reduction in peak roll after transfer compared to novel trials and the generation of compensatory moments in the appropriate direction (but insufficient magnitude) after transfer. Moreover, after transfer to the right hand unimanual and bimanual grasps, moment generation was driven by digit center of pressure modulation while transfer for left hand unimanual grasps was driven by load force modulation. In addition, we also show failed generalization after contralateral hand switch as evidenced by large post-transfer rolls and minimal moments. We suggest that learned manipulation of object torque is a high level of representation but that this representation can only be accessed by either digit kinematics or kinetics, depending on the hand used.
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Shu-MeiWang and 王淑美. "Effects of Task Constraints on Unimanual and Bimanual Movements in Patients With Schizophrenia." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/24244916562546398288.
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博士<br>國立成功大學<br>健康照護科學研究所<br>103<br>Although occupational therapists commonly treat patients with schizophrenia in clinical practice, the profession has been lacking sufficient evidence supporting its effectiveness. Recent studies suggested that schizophrenia affects not only mental function but also movements in patients. The knowledge of movement rehabilitation for patients with schizophrenia has not been developed properly now. Object size, object distance, and target speed of movement tasks are common task constraints in rehabilitation settings and can affect movement formation effectively in healthy people. Therefore, the purposes of this study were to compare the movements of patients with mild schizophrenia and healthy controls and to examine effects of changes in object size, object distance, and target speed on movements in patients.
The first experiment of this study was to examine effects of object size and distance on unimanual movements on the reach-to-grasp task in patients with mild schizophrenia. Twenty-nine patients and 15 age- and gender-matched healthy controls were required to reach for and grasp an object of varying sizes (small v.s. large) and distances (near v.s. far) by the dominant hand as quickly as possible. We measured movement time, peak velocity, the path length ratio, the percentage of time to peak velocity, and the number of movement units to represent movement speed, forcefulness, spatial efficiency, the control strategy, and smoothness. Patients showed similarly forceful, feedback-dependent, and smooth, but slower and less direct movements than controls. Increasing object size or shortening object distance induced faster and more preprogrammed movements in patients. Increasing object distance induced more direct movements in patients. Increasing object size or object distance induced more forceful movements in patients.
The second experiment was to examine effects of object size on unimanual and bimanual movements on the bimanual assembly task in patients with mild schizophrenia. Fifteen patients and 15 age- and gender-matched healthy controls were instructed to bimanually reach for and assemble objects to the stationary target as quickly as possible. We manipulated the object size for the left hand (small vs. large) and measured movement time, peak velocity, and bimanual synchronization to represent movement speed, forcefulness, and bimanual coordination. Patients showed slower and less forceful unimanual movements and less coordinated bimanual movements than controls. Increasing object size elicited faster and more forceful unimanual movements and more coordinated bimanual movements in patients.
The third experiment was to examine effects of target speed on unimanual and bimanual movements on the bimanual assembly task in patients with mild schizophrenia. Fifteen patients and 15 age- and gender-matched healthy controls were instructed to bimanually reach for (prehension) and assemble objects (assembly) to the moving target of varying speed (fast v.s. slow) as quickly as possible. We measured movement time, the number of movement units, and bimanual synchronization to represent movement speed, smoothness, and bimanual coordination. Increasing target speed induced faster, smoother, and more coordinated movements in patients. Under the slow-target condition, patients had slower and less coordinated prehension, as well as slower, more uneven, and less coordinated assembly than controls. Under the fast-target condition, patients still had slower and less coordinated prehension than controls, but their assembly improved to a level similar to that of controls.
This study provides insights into the unimanual and bimanual movement features in patients with mild schizophrenia and suggests the need for movement therapy for patients with schizophrenia. Additionally, this study specifies clinical practice guidelines of manipulating task constraints for optimizing patients’ movements and contributes to the practice of evidence-based occupational therapy for patients with mild schizophrenia.
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Anand, Deepthi. "Study of the trajectories of visually guided movement of unimanual and bimanual tasks." Thesis, 2002. http://library1.njit.edu/etd/fromwebvoyage.cfm?id=njit-etd2002-002.
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Geller, Daniel. "Home Mirror Therapy: A Randomized Control Study Comparing Unimanual and Bimanual Mirror Therapy for Improved Arm and Hand Function Post-stroke." Thesis, 2018. https://doi.org/10.7916/D83B7GNC.
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Stroke is the leading cause of disability in the United States. The majority of stroke survivors have persistent arm dysfunction, which impedes their daily task performance. Mirror therapy (MT) as an adjunct to occupational therapy (OT) has been shown to be effective in upper extremity (UE) recovery post-stroke. Two protocols, unimanual mirror therapy (UMT) and bimanual mirror therapy (BMT), have been used in OT practice; however, research specifically comparing these two intervention protocols is absent. The purpose of this study was to compare: (a) home-based UMT and BMT protocols, and (b) both MT protocols to home-based traditional occupational therapy (TOT) regarding upper limb recovery post-stroke.
Twenty-two chronic stroke participants were randomized into one of three groups: UMT, BMT, or TOT. The Action Research Arm Test (ARAT), Fugl-Meyer Assessment (FMA), ABILHAND, grip strength, and the Stroke Impact Scale (SIS) were administered pre- and post-intervention. Participants received outpatient OT 2 days/week for 45 minutes, plus a home program 30 minutes a day, 5 days/week for 6 weeks. A repeated measure ANOVA, Kruskal-Wallis Test, and Wilcoxon Ranked-Signed Test were used to compare the three groups, and 95% confidence intervals (CI) and effect sizes were calculated.
There was a main effect of time for all groups, except for SIS-strength and activities of daily living (ADL); however, no group differences were noted on any of the measures. When comparing UMT and BMT, the effect size for all measures, except for grip strength, favored UMT. In comparing both mirror groups to TOT, UMT had a moderate to large effect size on the ARAT, FMA, and ABILHAND, as compared to the small effect size for BMT. Furthermore, 95% CI data for the ABILHAND showed clinical significance in favor of UMT compared to TOT, but not for BMT.
This study showed that all groups improved over time and UMT may be more beneficial for UE recovery in chronic stroke individuals, compared to either BMT or TOT. However, given the small sample size, future studies comparing the two mirror protocols are necessary for more definitive conclusions to better inform clinicians of the optimal mode of MT treatment.
Books on the topic "Unimanual/ bimanual"
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Lee-Miller, Trevor. Transfer and Generalization of Learned Manipulation between Unimanual and Bimanual Tasks. [publisher not identified], 2020.
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Geller, Daniel. Home Mirror Therapy: A Randomized Control Study Comparing Unimanual and Bimanual Mirror Therapy for Improved Arm and Hand Function Post-stroke. [publisher not identified], 2018.
Find full textBook chapters on the topic "Unimanual/ bimanual"
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Trlep, Matic, Matjaž Mihelj, and Marko Munih. "Effects of Bimanual Motor Learning on Unimanual Performance." In Converging Clinical and Engineering Research on Neurorehabilitation. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-34546-3_88.
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Giachritsis, Christos D., and Alan M. Wing. "Weight Perception with Real and Virtual Weights Using Unimanual and Bimanual Precision Grip." In Springer Series on Touch and Haptic Systems. Springer London, 2012. http://dx.doi.org/10.1007/978-1-4471-2754-3_3.
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Guimarães, Elaine Leonezi, and Eloisa Tudella. "The effect of specific training of short duration on proximal and distal adjustments at the onset of reaching, in preterm and low birth weight infants: A randomized clinical trial." In A LOOK AT DEVELOPMENT. Seven Editora, 2023. http://dx.doi.org/10.56238/alookdevelopv1-188.
Full textAbstract:
This study aimed to verify the effect of specific training of short duration on the proximal (uni-and bimanual) and distal (aperture, orientation and the contact surface of the hand) adjustments of reaching, in the period of emergence in preterm infants and with low birth weight. The study included 18 infants of both sexes, born between 29-33 weeks gestational age, weighing less than 2500 grams, and who required peri- and postnatal hospital care. The infants were divided into two groups: experimental and control. The experimental group received a single specific training session (serial varied practice condition) for five minutes, and the control group received no training. Both groups were assessed twice on the same day (pre- and post-training). There was significant difference in the frequency of reaching of the experimental group after training (Z=-2.501, p=0.012) and when compared to the control group (U=17, p=0.037). Significant difference was observed in proximal adjustments where the infants in the experimental group showed more unimanual (Z=-2.252, p=0.024) and bimanual (Z=-2.232, p=0.026) reaching post-training, and between groups differences were observed for bimanual reaching (U=15, p=0.013) in the experimental group after training. In distal adjustments a significant difference was observed in the aperture of the hand (open, U=18, p=0.029), and the orientation of the palm (oblique, U=17.5, p=0.041) between groups. The results indicate that training of short duration enhanced reaching, increasing frequency, and proximal and distal adjustments consistent with age.
Conference papers on the topic "Unimanual/ bimanual"
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Latulipe, Celine, Craig S. Kaplan, and Charles L. A. Clarke. "Bimanual and unimanual image alignment." In the 18th annual ACM symposium. ACM Press, 2005. http://dx.doi.org/10.1145/1095034.1095057.
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Balaguer, Benjamin, and Stefano Carpin. "Bimanual regrasping from unimanual machine learning." In 2012 IEEE International Conference on Robotics and Automation (ICRA). IEEE, 2012. http://dx.doi.org/10.1109/icra.2012.6225095.
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Trlep, Matic, Matjaz Mihelj, Marko Munih, and Urska Puh. "Rehabilitation robot for unimanual and bimanual training of hemiparetic subjects." In 2011 International Conference on Virtual Rehabilitation (ICVR). IEEE, 2011. http://dx.doi.org/10.1109/icvr.2011.5971861.
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Huang, Yanpei, Jonathan Eden, Ekaterina Ivanova, and Etienne Burdet. "Human Performance of Three Hands in Unimanual, Bimanual and Trimanual Tasks." In 2022 44th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC). IEEE, 2022. http://dx.doi.org/10.1109/embc48229.2022.9871248.
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Miller, Aaron, and Eric Wade. "Classifying Unimanual and Bimanual Upper Extremity Tasks in Individuals Post-Stroke." In 2021 43rd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC). IEEE, 2021. http://dx.doi.org/10.1109/embc46164.2021.9629885.
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Giachritsis, Christos, Jorge Barrio, Manuel Ferre, Alan Wing, and Javier Ortego. "Evaluation of weight perception during unimanual and bimanual manipulation of virtual objects." In 2009 world Haptics Conference (WHC 2009). IEEE, 2009. http://dx.doi.org/10.1109/whc.2009.4810836.
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Marini, Francesca, Sara Contu, Charmayne M. L. Hughes, Pietro Morasso, and Lorenzo Masia. "Robotic assessment of manual asymmetries in unimanual and bimanual wrist joint position sense." In 2016 6th IEEE International Conference on Biomedical Robotics and Biomechatronics (BioRob). IEEE, 2016. http://dx.doi.org/10.1109/biorob.2016.7523744.
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Lee, Joon Hyub, Yongkwan Kim, Sang-Gyun An, and Seok-Hyung Bae. "Robot Telekinesis: Application of a Unimanual and Bimanual Object Manipulation Technique to Robot Control." In 2020 IEEE International Conference on Robotics and Automation (ICRA). IEEE, 2020. http://dx.doi.org/10.1109/icra40945.2020.9197517.
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Paranjape, Ruta P., Michelle J. Johnson, and Brinda Ramachandran. "Assessing Impaired Arm Use and Learned Bias after Stroke Using Unimanual and Bimanual Steering Tasks." In Conference Proceedings. Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2006. http://dx.doi.org/10.1109/iembs.2006.260026.
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Paranjape, Ruta P., Michelle J. Johnson, and Brinda Ramachandran. "Assessing Impaired Arm Use and Learned Bias after Stroke Using Unimanual and Bimanual Steering Tasks." In Conference Proceedings. Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2006. http://dx.doi.org/10.1109/iembs.2006.4398316.
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