Prespecified After-effects Elicited from Robotic Force Fields

Robots have a promising future in the area of training, particularly in neurorehabilitation. However, the most effective training algorithm has yet to be determined. Here we capitalize what is known about implicit learning in motor adaptation : – Repeated exposure to a force field leads the original movement being recovered. – Subjects do this by canceling the forces of the field. – When the disturbing force field is unexpectedly removed, subjects exhibit after-effects. (Shadmehr & Mussa-Ivaldi, 1994).