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orienting reflex

orienting reflex in Medicine

orienting reflex n.
An aspect of responding to environmental stimuli attending 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. Also called orienting response.

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