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Dual oscillations as the physiological basis for capacity limits

Published online by Cambridge University Press:  30 October 2001

Ole Jensen  and
John E. Lisman
Ole Jensen
Affiliation:
Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Helsinki 02015 HUT, Finlandojensen@neuro.hut.fi www.boojum.hut.fi/ojensen
John E. Lisman
Affiliation:
Department of Biology, Volen Center for Complex Systems, Brandeis University, Waltham, MA 02254 lisman@brandeis.edu www.bio.brandeis.edu/lismanlab/faculty.html
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Abstract

A physiological model for short-term memory (STM) based on dual theta (5–10 Hz) and gamma (20–60 Hz) oscillation was proposed by Lisman and Idiart (1995). In this model a memory is represented by groups of neurons that fire in the same gamma cycle. According to this model, capacity is determined by the number of gamma cycles that occur within the slower theta cycle. We will discuss here the implications of recent reports on theta oscillations recorded in humans performing the Sternberg task. Assuming that the oscillatory memory models are correct, these findings can help determine STM capacity.

Type
Brief Report
Information
Behavioral and Brain Sciences , Volume 24 , Issue 1 , February 2001 , pp. 126
Copyright
© 2001 Cambridge University Press

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