ABSTRACT

The vestibuloocular reflex recorded prior to the initiation of the afterimage agreed with published results for sinusoidal stimulation (Benson, 1970). After the flash was made and the afterimage appeared, the fast-phase movement almost disappeared and eye movements tended to become smooth. The apparent motion of the visual afterimage relative to the subject was in phase with the smooth eye movements, as expected. The cumulative eye position (sum of slow phases) and slow-phase velocity under afterimage tracking conditions were always greater than those of tracking in the dark prior to the flash.