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primitive reflex


Definition: any of various simple, stereotypic, automatic neuromuscular responses characteristic of the mature fetus and newborn but typically inhibited during the first year of life; primitive reflexes are directed by brainstem centers and include the startle (Moro), rooting, and tonic neck reflexes; abnormal persistence can lead to clumsiness, incoordination, and perceptual difficulties.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.