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raphespinal fibers

 

Definition: nerve fibers originating from cells of the nuclei raphe magnus, pallidus, and obscurus of the pons and medulla and terminating in the spinal cord gray matter; fibers involved in the descending inhibition of nociceptive input in the dorsal (posterior) horn; they contain serotonin.

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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