Backward spreading of memory-retrieval signal in the primate temporal cortex - PubMed (original) (raw)
Backward spreading of memory-retrieval signal in the primate temporal cortex
Y Naya et al. Science. 2001.
Erratum in
- Science 2001 Mar 2;291(5509):1703
Abstract
Bidirectional signaling between neocortex and limbic cortex has been hypothesized to contribute to the retrieval of long-term memory. We tested this hypothesis by comparing the time courses of perceptual and memory-retrieval signals in two neighboring areas in temporal cortex, area TE (TE) and perirhinal cortex (PRh), while monkeys were performing a visual pair-association task. Perceptual signal reached TE before PRh, confirming its forward propagation. In contrast, memory-retrieval signal appeared earlier in PRh, and TE neurons were then gradually recruited to represent the sought target. A reasonable interpretation of this finding is that the rich backward fiber projections from PRh to TE may underlie the activation of TE neurons that represent a visual object retrieved from long-term memory.
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