DO THE SACCADIC SYSTEM AND THE VESTIBULOOCULAR REFLEX OF MONKEYS SHARE A COMMON NEURAL INTEGRATOR

A common 'neural integrator' has been hypothesized to perform mathemat ical integration of velocity-coded inputs for ah oculomotor subsystems . Studies in cats suggested that the integrators for some subsystems m ay be differentially affected by drugs. Our tests in macaques show tha t the fixation is unaffected and saccadic and vestibule-ocular systems are affected in parallel. Thus, the common integrator hypothesis cann ot be ruled out on the basis of these results.