reticular activating system


The part of the reticular formation in the brainstem that plays a central role in bodily and behavioral alertness; its ascending connections affect the function of the cerebral cortex and its descending connections affect bodily posture and reflex mechanisms.

Nearby words

  1. reticent,
  2. reticently,
  3. reticle,
  4. reticul-,
  5. reticular,
  6. reticular cell,
  7. reticular degeneration,
  8. reticular dystrophy of cornea,
  9. reticular fiber,
  10. reticular formation

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.