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Full-Text Articles in Engineering
Visuomotor Learning Enhanced By Augmenting Instantaneous Trajectory Error Feedback During Reaching, James Patton, John Yejun, Preeti Bajaj, Robert Scheidt
Visuomotor Learning Enhanced By Augmenting Instantaneous Trajectory Error Feedback During Reaching, James Patton, John Yejun, Preeti Bajaj, Robert Scheidt
Robert Scheidt
We studied reach adaptation to a 30u visuomotor rotation to determine whether augmented error feedback can promote faster and more complete motor learning. Four groups of healthy adults reached with their unseen arm to visual targets surrounding a central starting point. A manipulandum tracked hand motion and projected a cursor onto a display immediately above the horizontal plane of movement. For one group, deviations from the ideal movement were amplified with a gain of 2 whereas another group experienced a gain of 3.1. The third group experienced an offset equal to the average error seen in the initial perturbations, while …
Visuo-Proprioceptive Interactions During Adaptation Of The Human Reach, Timothy Judkins, Robert Scheidt
Visuo-Proprioceptive Interactions During Adaptation Of The Human Reach, Timothy Judkins, Robert Scheidt
Robert Scheidt
We examined whether visual and proprioceptive estimates of transient (mid-reach) target capture errors contribute to motor adaptation according to the probabilistic rules of information integration used for perception. Healthy adult humans grasped and moved a robotic handle between targets in the horizontal plane while the robot generated spring-like loads that varied unpredictably from trial-to-trial. For some trials, a visual cursor faithfully tracked hand motion. In others, the handle's position was locked and subjects viewed motion of a point-mass cursor driven by hand forces. In yet other trials, cursor feedback was dissociated from hand motion or altogether eliminated. We used time- …