Visually Induced Adaptive Changes

I. Saccades are the rapid eye movements used to change visual fixation. Normal sac-cades end abruptly with very little postsaccadic ocular drift, but acute ocular motor deficits can cause the eyes to drift appreciably after a saccade. Previous studies in both patients and monkeys with peripheral ocular motor deficits have dernonsttatd t h a ~ the brain can suppress such postsaccadic drifts. Ocular drift might be suppressed in response to visual andlor pra-prioceptive reedback of position and/or veloc-ity errors. This study attempts to characterize the adaptive mechanism for suppression of postsaccadic drift. 2. The responses of seven rhesus monkey