Redding, G. M., & Wallace, B. (2012, in preparation). Prism adaptation in alternately exposed hands.

Intermanual transfer of proprioceptive aftereffects of prism adaptation in right-handers was assessed by alternate target pointing with the two hands for 40 successive trials, 20 trials with each hand. Adaptation was greater for the left hand when the right hand started the alternate pointing, but no difference appeared when the sequence of target pointing movements started with the left hand. The left hand advantage in adaptation was decreased when the right hand was tested first after exposure. Transfer occurred from right to left hands during both exposure and post exposure testing. Intermanual transfer reflects the process of maintaining spatial alignment between the two hands. The left hand appears to be calibrated with the right hand spatial map and when the two hands are misaligned the left hand spatial map is realigned with the right hand spatial map.