Fig. 12.

Effects of time on responses to paired stimuli.A, Responses to single-motion impulses, shown as a function of time within a trial. Z scores were calculated relative to the entire distribution of responses to each stimulus location, independent of time, and then averaged for each time position, across stimulus location. Responses clearly decline rapidly in the first 500 msec of each trial (four stimuli). B, Responses to pairs of stimuli, compared against the expected response for that location and time position. Because the stimulus sequence was random, many stimulus location–time position combinations were not represented in any given experiment, but all that were presented contribute to this average. For both Aand B, the error bars denote the SEM across cells.