orienting reflex

[ôrē-ĕn′tĭng]

n.

An aspect of responding to environmental stimuli in which an organism's initial response to a change or novel stimulus makes the organism more sensitive to the stimulation, as when the pupil of the eye dilates in response to dim light.orienting response

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