Abstract
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.
| Original language | English |
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| Pages (from-to) | 2085-2090 |
| Number of pages | 6 |
| Journal | Neurocomputing |
| Volume | 70 |
| Issue number | 10-12 |
| Publication status | Published - 1 Jan 2007 |