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

Abstract

Theoretical studies concerning iterative retrieval in conventional associative memories suggest that cortical gamma-oscillations may constitute sequences of fast associative processes each restricted to a single period. By providing a rhythmic threshold modulation suppressing cells that are uncorrelated 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 retrieval processes, and a very high memory capacity.