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Abstract:
To measure dynamic visuo-motor coupling within the two hemispheres, we showed
observers an animation of a rotating cup. They indicated with left or right buttons when a
fixation dot in the center of the animation changed color. For either hand, response times
changed continuously with the irrelevant position of the cups handle, even when the
perceptual asymmetry of the handle was controlled. This spontaneous lateralized motor
preparation showed both top-down and bottom-up components and was more pronounced
for the right than the left hand. The dynamic affordance method will help understand
perception-action coupling in the brain.
