Figure 4.

The effect of adaptation on responses of IT neurons. A, Adaptation decreases responses to the adapted view and views close to it, whereas responses to stimuli farther from the adapter are enhanced. The y-axis indicates the mean and SE of change in response attributable to adaptation for stimuli with various offset in viewing direction relative to the adapter (x-axis). The modulation index is defined as difference between maximal enhancement and suppression after adaptation. B, The effects of different strengths of adapter on responses of IT neurons. The darkest trace indicates the responses when adapter was optimal (>0.75), whereas the palest trace shows those responses when the adapter is non-optimal (<0.25). The two other traces are adaptation-induced responses for adapters between 0.25 and 0.5 and adapters between 0.5 and 0.75. C, The effect of adaptation is a factor of adapter strength. The x-axis indicates the adapter strength, i.e., the normalized response to the adapter before adaptation. The y-axis indicates the modulation index. The black line depicts the regression line fitting the data (modulation index = 0.577 + 0.313 × adapter response).