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Cortical Oscillations in Health and Disease$
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Roger Traub, MD and Miles Whittington, PhD

Print publication date: 2010

Print ISBN-13: 9780195342796

Published to Oxford Scholarship Online: May 2010

DOI: 10.1093/acprof:oso/9780195342796.001.0001

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Very Fast Oscillations

Very Fast Oscillations

(p.245) 10 Very Fast Oscillations
Cortical Oscillations in Health and Disease

Roger D. Roger

Miles A. Whittington

Oxford University Press

VFO occurs in in vitro models when chemical receptors are blocked. In particular, VFO does not require GABAA receptors, even though interneurons fire at high rates during in vivo very fast oscillations. VFO can be accounted for by a model in which neuronal spiking percolates through a sparse network of electrically coupled axons. This model predicts that VFO frequency depends on gap junction conductance, mediated by an effect on crossing time (i.e. the time it takes for a spike in one axon to elicit a spike in a coupled axon, estimated to be of order 0.2 ms). VFO in cerebellar slices also depends on gap junctions, but the physical principles are slightly different: cerebellar VFO appears to depend on many:one propagation of spiking, in effect a form of axonal coincidence detection.

Keywords:   very fast oscillation, gap junction, percolation, graph theory, ripple

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