Predictions on Neocortical Dynamics Derived from Studies in Paleocortex

  • Walter J. Freeman
Part of the Brain Dynamics book series (BD)


Studies for more than six decades of oscillations in the ranges of theta (3–7 Hz), alpha (8–12 Hz), and beta (13–25 Hz) activity have created an immense data base but have given little understanding of their neurogenesis. In contrast, the neurodynamics of gamma activity (25–90 Hz) is better understood, but measurements in neocortex have been relatively few. This has been due partly to its contamination by nonneural potentials, especially by electrode noise and by electromyographic (EMG) potentials from the scalp muscles during noninvasive recordings from humans, and partly to its characteristics of broad spectrum, aperiodicity, and low amplitude.


Olfactory Bulb Olfactory System Inhibitory Neuron Excitatory Neuron Gamma Activity 
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© Springer Science+Business Media New York 1992

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  • Walter J. Freeman

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