Reticular Activating System
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.
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“it is best then that the buried word remain buried for we were intended to appreciate only its fruits and not the secret principle activating them to know this would be to know too much. Meanwhile it is possible to know just enough, and this is all we were supposed to know, toward which we have been straining all our lives.”
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