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PLoS One. 2009;4(2):e4338. doi: 10.1371/journal.pone.0004338. Epub 2009 Feb 3.

Neuronal shot noise and Brownian 1/f2 behavior in the local field potential.

Author information

1
California Institute of Technology, Pasadena, California, United States of America. milstein@caltech.edu

Abstract

We demonstrate that human electrophysiological recordings of the local field potential (LFP) from intracranial electrodes, acquired from a variety of cerebral regions, show a ubiquitous 1/f(2) scaling within the power spectrum. We develop a quantitative model that treats the generation of these fields in an analogous way to that of electronic shot noise, and use this model to specifically address the cause of this 1/f(2) Brownian noise. The model gives way to two analytically tractable solutions, both displaying Brownian noise: 1) uncorrelated cells that display sharp initial activity, whose extracellular fields slowly decay in time and 2) rapidly firing, temporally correlated cells that generate UP-DOWN states.

PMID:
19190760
PMCID:
PMC2629847
DOI:
10.1371/journal.pone.0004338
[Indexed for MEDLINE]
Free PMC Article

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