By comparing electrodermal response amplitudes from the right and left hands when either the right foot or left foot was flexed, it was possible to demonstrate relative augmentation of the response amplitude on the side ipsi-lateral to the active member. Comparison of responses from the left hand and left foot showed relative augmentation of the hand response with motor activity in the opposite hand and of the foot response with motor activity of the opposite foot. These regional influences also appeared when the response to motor activity was compared with centrally elicited orienting responses.
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