期刊
NEUROCOMPUTING
卷 70, 期 10-12, 页码 2085-2090出版社
ELSEVIER
DOI: 10.1016/j.neucom.2006.10.087
关键词
electroencephalogram; self-organization; gamma band; 40 Hz; synchronization
We present evidence that large-scale spatial coherence of 40 Hz oscillations can emerge dynamically in a cortical mean field theory. The simulated synchronization time scale is about 150 ms, which compares well with experimental data on large-scale integration during cognitive tasks. The same model has previously provided consistent descriptions of the human EEG at rest, with tranquilizers, under anesthesia, and during anesthetic-induced epileptic seizures. The emergence of coherent gamma band activity is brought about by changing just one physiological parameter until cortex becomes marginally unstable for a small range of wavelengths. This suggests for future study a model of dynamic computation at the edge of cortical stability. (c) 2006 Elsevier B.V. All rights reserved.
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