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Electrocortical temporal complexity during wakefulness and sleep: an updated account

Gonzalez, J.; Cavelli, M.; Mondino, A.; Pascovich, C.; Castro, S.; Rubido, N.; Torterolo, P.

2020-02-24 neuroscience
10.1101/2020.02.20.958462 bioRxiv
Show abstract

The states of sleep and wakefulness are critical physiological processes associated with different brain patterns of activity. The intracranial electroencephalogram allows us to measure these changes, thus, it is a critical tool for its study. Recently, we showed that the electrocortical temporal complexity decreased from wakefulness to sleep. Nevertheless, the origin of this complex activity remains a controversial topic due to the existence of possible artifacts contaminating the brain signals. In this work, we showed that complexity decreases during sleep, independently of the electrode configuration employed. This fact strongly suggests that the basis for the behavioral-state differences in complexity does not have an extracranial origin; i.e., generated from the brain.

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