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Rhythms of the Brain$
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György Buzsáki

Print publication date: 2006

Print ISBN-13: 9780195301069

Published to Oxford Scholarship Online: May 2009

DOI: 10.1093/acprof:oso/9780195301069.001.0001

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Coupling of Systems by Oscillations

Coupling of Systems by Oscillations

(p.334) Cycle 12 Coupling of Systems by Oscillations
Rhythms of the Brain

Buzsáki György

Oxford University Press

Oscillatory packaging of information can define the length of messages and allows for efficient exchange of information across anatomical domains. Messages can be exchanged by forced oscillations, resonant loops, or transient oscillatory coupling. Neocortical neurons various allo- and neocortical regions are phase-locked transiently to hippocampal oscillations. The advantage of this is that assembly messages can reach the hippocampus at times (phases) when its receiving state is optimal. Exchange of information between the hippocampus and neocortex continues when the brain is disengaged from the environment (“offline” states), although at a different temporal scale. The CA3 recurrent collateral system brings about short-lived fast oscillations in the target CA1-subiculum-parasubiculum-entorhinal cortex output circuits, known as the sharp-wave-ripple complex. The ubiquitous and simultaneous presence of multiple oscillators in various parts of the brain often leads to transient cross-frequency coupling or phase-modulation of the power of a faster event by a slower oscillator.

Keywords:   phase coupling, resonant loops, multiplexing by oscillatory coupling, spindle ripple coupling, information transfer

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