A model of the hippocampus is presented which forms rapid self-organized representations of input arriving via the perforant path, performs recall of previous associations in region CA3, and performs comparison of this recall with afferent input in region CA1. This comparison drives feedback regulation of cholinergic modulation to set appropriate dynamics for learning of new representations in region CA3 and CA1. The network responds to novel patterns with increased cholinergic modulation, allowing storage of new self-organized representations, but responds to familiar patterns with a decrease in acetylcholine, allowing recall based on previous representations. This requires selectivity of the cholinergic suppression of synaptic transmission in stratum radiatum of regions CA3 and CA1, which has been demonstrated experimentally.
|Number of pages||8|
|State||Published - 1994|
|Event||7th International Conference on Neural Information Processing Systems, NIPS 1994 - Denver, United States|
Duration: 1 Jan 1994 → 1 Jan 1994
|Conference||7th International Conference on Neural Information Processing Systems, NIPS 1994|
|Period||1/01/94 → 1/01/94|
Bibliographical noteFunding Information:
This work supported by a pilot grant from the Massachusetts Alzheimer's Disease Research Center and by an NIMH FIRST award MH52732-01.
© NIPS 1994.All rights reserved.
ASJC Scopus subject areas
- Information Systems
- Signal Processing
- Computer Networks and Communications