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Proc. Natl. Acad. Sci. USA Vol. 87, pp. 9241-9245, December 1990

Summary: Proc. Natl. Acad. Sci. USA
Vol. 87, pp. 9241-9245, December 1990
Modulation of function and gated learning in a network memory
(model neuron/associative memory/neuromodulation/synaptic plasticity)
Physics Department and Center for Complex Systems, Brandeis University, Waltham, MA 02254
Communicated by John Ross, July 17, 1990 (receivedfor review April 4, 1990)
ABSTRACT Memory and learning are studied in a model
neural network made from component cells with a variety of
realistic intrinsic dynamic behaviors. Modulation of intrinsic
ceilular characteristics causes a network to switch between two
entirely different modes ofoperation. In one mode the network
acts as a selective, long-term associative memory, whereas in
the other it is a nonselective, short-term latching memory. Such
functional modulation can be used as a mechanism for initiat-
ing and terminating learning in a network associative memory.
In addition to displaying complex collective phenomena in
networks, biological neurons exhibit a wide variety of intrin-
sic dynamical behaviors, even in isolation. How does intrin-


Source: Abbott, Laurence - Center for Neurobiology and Behavior & Department of Physiology and Cellular Biophysics, Columbia University


Collections: Biology and Medicine