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Título: | Neuronal Shot Noise and Brownian 1/f2 Behavior in the Local Field Potential |
Autor: | Milstein, Joshua; Mormann, Florian; Fried, Itzhak; Koch, Christof | Palabras clave: | Shot noise Brownian noise 1/f2 Local Field Potential |
Fecha de publicación: | 3-feb-2009 | Editor: | Public Library of Science | Citación: | PLoS ONE. 2009; 4(2): e4338 | Resumen: | 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/f2 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/f2 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. | Descripción: | 5 pages, 4 figures.-- PMID: 19190760 [PubMed].-- PMCID: PMC2629847. | Versión del editor: | http://dx.doi.org/10.1371/journal.pone.0004338 | URI: | http://hdl.handle.net/10261/14180 | DOI: | 10.1371/journal.pone.0004338 | ISSN: | 1932-6203 |
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