REDUCTION OF A PATTERN-INDUCED MOTION AFTEREFFECT BY BINOCULAR-RIVALRY SUGGESTS THE INVOLVEMENT OF EXTRASTRIATE MECHANISMS

Previous research suggests that plaid-induced motion aftereffects (MAE s) involve extrastriate mechanisms (Wenderoth et al., 1988). There is evidence also that binocular rivalry occurs beyond V1 and that it disr upts the processing of MAEs which are believed to be based upon extras triate mechanisms (e.g. the spiral MAE) but not MAEs, such as linear M AE induced by a drifting grating, which are thought to arise in striat e cortex (Wiesenfelder & Blake, 1990). The logical inference is that b inocular rivalry during drifting plaid-induced adaptation should reduc e the MAEs which result. We report experiments which confirm this pred iction.