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Full-Text Articles in Engineering
Remembering Forward: Neural Correlates Of Memory And Prediction In Human Motor Adaptation, Robert A. Scheidt, Janice Zimbelman, Nicole M.G. Salowitz, Aaron J. Suminski, Kristine M. Mosier, James Houk, Lucia Simo
Remembering Forward: Neural Correlates Of Memory And Prediction In Human Motor Adaptation, Robert A. Scheidt, Janice Zimbelman, Nicole M.G. Salowitz, Aaron J. Suminski, Kristine M. Mosier, James Houk, Lucia Simo
Robert Scheidt
We used functional MR imaging (FMRI), a robotic manipulandum and systems identification techniques to examine neural correlates of predictive compensation for spring-like loads during goal-directed wrist movements in neurologically-intact humans. Although load changed unpredictably from one trial to the next, subjects nevertheless used sensorimotor memories from recent movements to predict and compensate upcoming loads. Prediction enabled subjects to adapt performance so that the task was accomplished with minimum effort. Population analyses of functional images revealed a distributed, bilateral network of cortical and subcortical activity supporting predictive load compensation during visual target capture. Cortical regions – including prefrontal, parietal and hippocampal …
Effects Of Optimal Tactile Feedback In Balancing Tasks: A Pilot Study, Emmanouil Tzorakoleftherakis, Ferdinando Mussa-Ivaldi, Robert Scheidt, Todd Murphey
Effects Of Optimal Tactile Feedback In Balancing Tasks: A Pilot Study, Emmanouil Tzorakoleftherakis, Ferdinando Mussa-Ivaldi, Robert Scheidt, Todd Murphey
Robert Scheidt
In this study, we employ optimal control and tactile feedback to teach subjects how to balance a simulated inverted pendulum. The output of a Linear Quadratic Regulator (LQR) was converted to a vibratory teacher-signal and was provided as additional somatosensory feedback to the subjects. The LQR approach is consistent with an energy-saving strategy commonly observed during human motor learning. Our rationale for using the inverted pendulum as a criterion task is that this balance system requires the brain to solve many of the same problems encountered in simple tasks of daily living like transporting a glass of water to the …
Motivating Rehabilitation By Distorting Reality, James L. Patton, Yejun Wei, Chris Scharver, Robert V. Kenyon, Robert A. Scheidt
Motivating Rehabilitation By Distorting Reality, James L. Patton, Yejun Wei, Chris Scharver, Robert V. Kenyon, Robert A. Scheidt
Robert Scheidt
We have found, through a series of recent experiments, encouraging evidence that the neuro-motor system is motivated to change motor patterns when exposed to visuo-motor tasks. We have also shown that the learning of these tasks can be heightened with forces and/or visual distortions that appropriately manipulate the error. This process does not require intense concentration and it is often considered a game. We describe the next generation of robotic large-workspace, three dimensional haptics/graphics systems for rehabilitation