Does the 1/f Frequency Scaling of Brain Signals Reflect Self-Organized Critical States?

C. Bédard, H. Kröger, and A. Destexhe
Phys. Rev. Lett. 97, 118102 – Published 13 September 2006

Abstract

Many complex systems display self-organized critical states characterized by 1/f frequency scaling of power spectra. Global variables such as the electroencephalogram, scale as 1/f, which could be the sign of self-organized critical states in neuronal activity. By analyzing simultaneous recordings of global and neuronal activities, we confirm the 1/f scaling of global variables for selected frequency bands, but show that neuronal activity is not consistent with critical states. We propose a model of 1/f scaling which does not rely on critical states, and which is testable experimentally.

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  • Received 27 March 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.118102

©2006 American Physical Society

Authors & Affiliations

C. Bédard1,2, H. Kröger2, and A. Destexhe1,*

  • 1Integrative and Computational Neuroscience Unit (UNIC), CNRS, Gif-sur-Yvette, France
  • 2Department of Physics, Université Laval, Québec, Canada

  • *Corresponding author. Email address: destexhe@iaf.cnrs-gif.fr

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Vol. 97, Iss. 11 — 15 September 2006

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