a diffuse system of nerve cells that controls arousal by activating both the central nervous system and the autonomic nervous system when stimuli are encountered. A principal component is the reticular formation, which is found at the base of the brain.

AROUSAL SYSTEM: "An individual's arousal system comprises a complex set of nerve cells that produce or inhibit a physiological reaction to stimuli. "
Cite this page: N., Pam M.S., "AROUSAL SYSTEM," in, April 7, 2013, (accessed April 23, 2021).