Article

Spatial, Temporal, and Associative Behavioral Functions Associated with Different Subregions of the Hippocampus

Raymond P. Kesner, Andrea M. Morris and Christy S. S. Weeden

in The Oxford Handbook of Comparative Cognition

Second edition

Published in print March 2012 | ISBN: 9780195392661
Published online September 2012 | | DOI: http://dx.doi.org/10.1093/oxfordhb/9780195392661.013.0018

Series: Oxford Library of Psychology

 Spatial, Temporal, and Associative Behavioral Functions Associated with Different Subregions of the Hippocampus

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This chapter presents evidence that (a) the dentate gyrus (DG) has at least three major functions, including conjunctive encoding of multiple sensory inputs, spatial pattern separation, and facilitation of encoding of spatial information; (b) the CA3 has at least three major functions, including short-term memory and rapid encoding, arbitrary associations, and pattern completion; and (c) the CA1 has at least four major functions, including temporal processing of information (temporal order memory), association across time, intermediate memory, and consolidation of new information. It presents additional evidence demonstrating that there are dissociations and associations between the DG and CA3. The dominant view of the relationship between CA3 and CA1 and short-term and intermediate-term memory is that they operate as a feed-forward sequential processing system. The more recent data, however, suggest that, for certain tasks, there are dissociations between short-term and intermediate-term memory and between the involvements of the CA3 and CA1 subregions. Yet, for a different set of tasks, both the CA1 and CA3 interact in processing of short-term and intermediate-term memory.

Keywords: hippocampus; rats; dentate gyrus; brain; CA1; CA3; memory

Article.  17383 words. 

Subjects: Psychology ; Cognitive Psychology ; Cognitive Neuroscience

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