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

Joshua Milstein*, Florian Mormann, Itzhak Fried, Christof Koch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article numbere4338
JournalPLoS ONE
Issue number2
StatePublished - 2009


Dive into the research topics of 'Neuronal shot noise and brownian 1/f2 behavior in the local field potential'. Together they form a unique fingerprint.

Cite this