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Frequency of gamma oscillations routes flow of information in the hippocampus

Frequency of gamma oscillations routes flow of information in the hippocampus In neuronal networks, the gamma frequency oscillation is thought to be important for several higher-end cognitive processes, such as attention and memory. Coordinated firing by widely distributed cells is required to produce an oscillation, but this network activity can be quite variable. It is not clear why gamma oscillations should differ so greatly across time and space. New evidence reveals that information trafficking within the hippocampus and parts of temporal cortex is dependent upon the speed of gamma. Faster oscillations link entorhinal cortex to CA1, providing information on the animal's location, while slower oscillations link CA1 to CA3 for information storage. Thus, one possible function underlying a variable gamma is to properly route information within a circuit. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nature Springer Journals

Frequency of gamma oscillations routes flow of information in the hippocampus

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References (31)

Publisher
Springer Journals
Copyright
Copyright © 2009 by Macmillan Publishers Limited. All rights reserved
Subject
Science, Humanities and Social Sciences, multidisciplinary; Science, Humanities and Social Sciences, multidisciplinary; Science, multidisciplinary
ISSN
0028-0836
eISSN
1476-4687
DOI
10.1038/nature08573
Publisher site
See Article on Publisher Site

Abstract

In neuronal networks, the gamma frequency oscillation is thought to be important for several higher-end cognitive processes, such as attention and memory. Coordinated firing by widely distributed cells is required to produce an oscillation, but this network activity can be quite variable. It is not clear why gamma oscillations should differ so greatly across time and space. New evidence reveals that information trafficking within the hippocampus and parts of temporal cortex is dependent upon the speed of gamma. Faster oscillations link entorhinal cortex to CA1, providing information on the animal's location, while slower oscillations link CA1 to CA3 for information storage. Thus, one possible function underlying a variable gamma is to properly route information within a circuit.

Journal

NatureSpringer Journals

Published: Nov 19, 2009

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