The Experts below are selected from a list of 27 Experts worldwide ranked by ideXlab platform
Ahmed A Mostafa - One of the best experts on this subject based on the ideXlab platform.
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intermanual Transfer and proprioceptive recalibration following training with translated visual feedback of the hand
Experimental Brain Research, 2014Co-Authors: Ahmed A Mostafa, Danielle Salomonczyk, Erin K Cressman, Denise Y P HenriquesAbstract:Reaching with visual feedback that is misaligned with respect to the actual hand’s location leads to changes in reach trajectories (i.e., visuoMotor adaptation). Previous studies have also demonstrated that when training to reach with misaligned visual feedback of the hand, the opposite hand also partially adapts, providing evidence of intermanual Transfer. Moreover, our laboratory has shown that visuoMotor adaptation to a misaligned hand cursor, either translated or rotated relative to the hand, also leads to changes in felt hand position (what we call proprioceptive recalibration), such that subjects’ estimate of felt hand position relative to both visual and non-visual reference markers (e.g., body midline) shifts in the direction of the visuoMotor distortion. In the present study, we first determined the extent that Motor adaptation to a translated cursor leads to Transfer to the opposite hand, and whether this Transfer differs across the dominant and non-dominant hands. Second, we looked to establish whether changes in hand proprioception that occur with the trained hand following adaptation also Transfer to the untrained hand. We found intermanual Motor Transfer to the left untrained (non-dominant) hand after subjects trained their right (dominant) hand to reach with translated visual feedback of their hand. Motor Transfer from the left trained to the right untrained hand was not observed. Despite finding changes in felt hand position in both trained hands, we did not find similar evidence of proprioceptive recalibration in the right or left untrained hands. Taken together, our results suggest that unlike visuoMotor adaptation, proprioceptive recalibration does not Transfer between hands and is specific only to the arm exposed to the distortion.
Denise Y P Henriques - One of the best experts on this subject based on the ideXlab platform.
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intermanual Transfer and proprioceptive recalibration following training with translated visual feedback of the hand
Experimental Brain Research, 2014Co-Authors: Ahmed A Mostafa, Danielle Salomonczyk, Erin K Cressman, Denise Y P HenriquesAbstract:Reaching with visual feedback that is misaligned with respect to the actual hand’s location leads to changes in reach trajectories (i.e., visuoMotor adaptation). Previous studies have also demonstrated that when training to reach with misaligned visual feedback of the hand, the opposite hand also partially adapts, providing evidence of intermanual Transfer. Moreover, our laboratory has shown that visuoMotor adaptation to a misaligned hand cursor, either translated or rotated relative to the hand, also leads to changes in felt hand position (what we call proprioceptive recalibration), such that subjects’ estimate of felt hand position relative to both visual and non-visual reference markers (e.g., body midline) shifts in the direction of the visuoMotor distortion. In the present study, we first determined the extent that Motor adaptation to a translated cursor leads to Transfer to the opposite hand, and whether this Transfer differs across the dominant and non-dominant hands. Second, we looked to establish whether changes in hand proprioception that occur with the trained hand following adaptation also Transfer to the untrained hand. We found intermanual Motor Transfer to the left untrained (non-dominant) hand after subjects trained their right (dominant) hand to reach with translated visual feedback of their hand. Motor Transfer from the left trained to the right untrained hand was not observed. Despite finding changes in felt hand position in both trained hands, we did not find similar evidence of proprioceptive recalibration in the right or left untrained hands. Taken together, our results suggest that unlike visuoMotor adaptation, proprioceptive recalibration does not Transfer between hands and is specific only to the arm exposed to the distortion.
Rachael D Seidler - One of the best experts on this subject based on the ideXlab platform.
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neuroanatomical correlates of Motor acquisition and Motor Transfer
Journal of Neurophysiology, 2008Co-Authors: Rachael D Seidler, Douglas C NollAbstract:The acquisition of new Motor skills is dependent on task practice. In the case of Motor Transfer, learning can be facilitated by prior practice of a similar skill. Although a multitude of studies have investigated the brain regions contributing to skill acquisition, the neural bases associated with the savings seen at Transfer have yet to be determined. In the current study, we used functional MRI to examine how brain activation differs during acquisition and Transfer of a visuoMotor adaptation task. Two groups of participants adapted manual aiming movements to three different rotations of the feedback display in a sequential fashion, with a return to baseline display conditions between each rotation. Subjects showed a savings in the rate of adaptation when they had prior adaptive experiences (i.e., positive Transfer of learning). This savings was associated with a reduction in activity of brain regions typically recruited early in the adaptation process, including the right inferior frontal gyrus, primary Motor cortex, inferior temporal gyrus, and the cerebellum (medial HIII). Moreover, although these regions exhibit activation that is correlated across subjects with the rate of acquisition, the degree of savings at Transfer was correlated with activity in the right cingulate gyrus, left superior parietal lobule, right inferior parietal lobule, left middle occipital gyrus, and bilaterally in the cerebellum (HV/VI). The cerebellar activation was in the regions surrounding the posterior superior fissure, which is thought to be the site of storage for acquired internal models. Thus we found that Motor Transfer is associated with brain activation that typically characterizes late learning and storage. Transfer seems to involve retrieval of a previously formed Motor memory, allowing the learner to move more quickly through the early stage of learning.
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aging affects Motor learning but not savings at Transfer of learning
Learning & Memory, 2007Co-Authors: Rachael D SeidlerAbstract:Two important components of skill learning are the learning process itself (Motor acquisition) and the ability to Transfer what has been learned to new task variants (Motor Transfer). Many studies have documented age-related declines in the ability to learn new manual Motor skills. In this study, I tested whether the degree of savings at Transfer of learning is similarly affected by advancing age. Young and older adults made aiming movements with a joystick to hit targets presented on a computer screen, with real-time feedback display of their movement. They adapted to three different rotations of the feedback display in a sequential fashion, with return to the normal feedback display between each. Adaptation performance was better when it was preceded by other adaptive experiences, regardless of age.
Danielle Salomonczyk - One of the best experts on this subject based on the ideXlab platform.
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intermanual Transfer and proprioceptive recalibration following training with translated visual feedback of the hand
Experimental Brain Research, 2014Co-Authors: Ahmed A Mostafa, Danielle Salomonczyk, Erin K Cressman, Denise Y P HenriquesAbstract:Reaching with visual feedback that is misaligned with respect to the actual hand’s location leads to changes in reach trajectories (i.e., visuoMotor adaptation). Previous studies have also demonstrated that when training to reach with misaligned visual feedback of the hand, the opposite hand also partially adapts, providing evidence of intermanual Transfer. Moreover, our laboratory has shown that visuoMotor adaptation to a misaligned hand cursor, either translated or rotated relative to the hand, also leads to changes in felt hand position (what we call proprioceptive recalibration), such that subjects’ estimate of felt hand position relative to both visual and non-visual reference markers (e.g., body midline) shifts in the direction of the visuoMotor distortion. In the present study, we first determined the extent that Motor adaptation to a translated cursor leads to Transfer to the opposite hand, and whether this Transfer differs across the dominant and non-dominant hands. Second, we looked to establish whether changes in hand proprioception that occur with the trained hand following adaptation also Transfer to the untrained hand. We found intermanual Motor Transfer to the left untrained (non-dominant) hand after subjects trained their right (dominant) hand to reach with translated visual feedback of their hand. Motor Transfer from the left trained to the right untrained hand was not observed. Despite finding changes in felt hand position in both trained hands, we did not find similar evidence of proprioceptive recalibration in the right or left untrained hands. Taken together, our results suggest that unlike visuoMotor adaptation, proprioceptive recalibration does not Transfer between hands and is specific only to the arm exposed to the distortion.
Erin K Cressman - One of the best experts on this subject based on the ideXlab platform.
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intermanual Transfer and proprioceptive recalibration following training with translated visual feedback of the hand
Experimental Brain Research, 2014Co-Authors: Ahmed A Mostafa, Danielle Salomonczyk, Erin K Cressman, Denise Y P HenriquesAbstract:Reaching with visual feedback that is misaligned with respect to the actual hand’s location leads to changes in reach trajectories (i.e., visuoMotor adaptation). Previous studies have also demonstrated that when training to reach with misaligned visual feedback of the hand, the opposite hand also partially adapts, providing evidence of intermanual Transfer. Moreover, our laboratory has shown that visuoMotor adaptation to a misaligned hand cursor, either translated or rotated relative to the hand, also leads to changes in felt hand position (what we call proprioceptive recalibration), such that subjects’ estimate of felt hand position relative to both visual and non-visual reference markers (e.g., body midline) shifts in the direction of the visuoMotor distortion. In the present study, we first determined the extent that Motor adaptation to a translated cursor leads to Transfer to the opposite hand, and whether this Transfer differs across the dominant and non-dominant hands. Second, we looked to establish whether changes in hand proprioception that occur with the trained hand following adaptation also Transfer to the untrained hand. We found intermanual Motor Transfer to the left untrained (non-dominant) hand after subjects trained their right (dominant) hand to reach with translated visual feedback of their hand. Motor Transfer from the left trained to the right untrained hand was not observed. Despite finding changes in felt hand position in both trained hands, we did not find similar evidence of proprioceptive recalibration in the right or left untrained hands. Taken together, our results suggest that unlike visuoMotor adaptation, proprioceptive recalibration does not Transfer between hands and is specific only to the arm exposed to the distortion.