Arousal transitions in sleep, wakefulness, and anesthesia are characterized by an orderly sequence of cortical events.

ABSTRACT: Many aspects of brain function are influenced by modulatory processes, including arousal. The most abrupt changes in arousal occur at the wake-sleep transition and at the induction of anesthetic conditions. They are accompanied by major electrophysiological changes, including an emergence of low-frequency (sleep-like) activity and a loss of mid-frequency (wake-like) activity that has been linked to feedback processes of the brain. Nevertheless, the causal relationship between these two types of electrophysiological changes, as well as the cortical mechanisms underlying changes in arousal and consciousness, remain poorly understood. To address this, we studied spontaneous electro-cortical activity during arousal changes in macaques. During sleep and at loss of consciousness induced by propo

SUBMITTER: Liu X 

PROVIDER: S-EPMC4468021 | biostudies-literature | 2015 Aug

REPOSITORIES: biostudies-literature