Gamma-oscillations support optimal retrieval in associative memories of two-compartment neurons

Theoretical studies concerning iterative retrieval in conventional associat ive memories suggest that cortical gamma-oscillations may constitute sequen ces of fast associative processes each restricted to a single period. By pr oviding a rhythmic threshold modulation suppressing cells that are uncorrel ated with a stimulus, interneurons significantly contribute to this process . This hypothesis is tested in the present paper utilizing a network of two -compartment model neurons developed by Pinsky and Rinzel. It is shown that gamma-oscillations can simultaneously support an optimal speed for single pattern retrieval, an optimal repetition frequency for consecutive retrieva l processes, and a very high memory capacity, (C) 1999 Elsevier Science B.V . All rights reserved.