Abstract
When the monkey was trained repeatedly in a delayed match-to-sample task with a fixed sequence of visual stimuli, responses of inferior temporal neurons to adjacent stimuli in the sequence are mutually correlated although the monkey was not required to associate the stimuli with each other. There exist two kinds of models accounting for this correlation, but neither model is sufficiently supported by physiological evidence; rather, they seem incompatible with some findings on the perirhinal cortex. We present a different model consisting of two networks corresponding to area TE and the perirhinal cortex that explains the above phenomenon based on a more plausible mechanism, and show that the plasticity in the perirhinal cortex may play a key role in implicit association learning.
