Directionally selective channels mediate the discrimination of moving aperiodic stimuli.
Adaptation procedures were used to demonstrate that directionally selective channels mediate the discrimination of aperiodic stimuli moving at a common speed. Subjects were adapted to a grating that drifted to either the left or the right. They then determined the orientation of the gap in a 'C' that was also moving to either the left or the right. Performance in identifying the gap orientation was most impaired when the C moved in the same direction as the adapting grating.
D000221:Adaptation, Ocular; D006801:Humans; D009039:Motion Perception / Q000502:physiology*; D011930:Reaction Time; D013028:Space Perception / Q000502:physiology