More than synchrony: EEG chaoticity may be necessary for conscious brain functioning.

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Transient phase synchronization of EEG oscillations was reported to be essential for conscious brain activity. However, it has been argued that EEG synchrony is not the only necessary factor, but at least must be accompanied by a sufficient complexity of brain dynamics. Here, we propose that, besides complexity, EEG chaoticity may be another necessary condition for conscious brain functioning.