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Phys Rev Lett. 2006 Sep 15;97(11):118102. Epub 2006 Sep 13.

Does the 1/f frequency scaling of brain signals reflect self-organized critical states?

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Integrative and Computational Neuroscience Unit (UNIC), CNRS, Gif-sur-Yvette, France.


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.

[Indexed for MEDLINE]

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