The reticular activating system (RAS) or extrathalamic control modulatory system is a set of connected nuclei in the brains of vertebrates that is responsible for regulating arousal and sleep-wake transitions. As its name implies its most influential component is the reticular formation.
This page contains content from the copyrighted Wikipedia article "Reticular activating system"; that content is used under the GNU Free Documentation License (GFDL). You may redistribute it, verbatim or modified, providing that you comply with the terms of the GFDL.
