reticular activating system


: a part of the reticular formation that extends from the brain stem to the midbrain and thalamus with connections distributed throughout the cerebral cortex and that controls the degree of activity of the central nervous system (as in maintaining sleep and wakefulness and in making transitions between the two states)

Dictionary Entries Near reticular activating system


reticular activating system

reticular cell

Cite this Entry

“Reticular activating system.” Medical Dictionary, Merriam-Webster, Accessed 7 Dec. 2023.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!