raphe nucleus

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Related to Raphé nucleus: Median raphe nucleus, Nucleus raphe magnus, Dorsal raphe nucleus

raphe nucleus

Any of a set of midline reticular nuclei in the midbrain and hindbrain tegmentum that send serotonergic axons widely throughout the forebrain brain via the medial forebrain bundle. Raphe nuclei appear to regulate sleep and aggressive behavior and to influence pain perception.
See also: nucleus