responding to external stimuli; a term applied to the cerebrospinal nervous system.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
Pertaining to the response of the nervous system to external stimuli.
[L. extero, from outside, + affectus, affected]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012