Complexity of brain dynamics as a correlate of consciousness in anaesthetized monkeys
bioRxiv Preprint Server August 17, 2021 Nicolas Fuentes, Alexis García, Ramón Guevara et al. preprint
The complexity of brain activity can serve as a correlate of consciousness. In monkeys, electrocorticogram recordings were analyzed using information quantifiers to compare stages of general anesthesia. For propofol and medetomidine, the anesthetized state showed a reduction in brain activity complexity. Conversely, ketamine produced an increase in complexity measurements, linked to increased activity in certain brain regions. Complexity of brain activity is a good indicator for evaluating different levels of consciousness awareness, in both anesthetized and non-anesthetized states.