Definition: a group of small, somatic, motor neurons in the ventral horn of the spinal cord at sacral 2 level that innervate the vesicorectal sphincters, i.e., the external anal and the urethral sphincter; Onuf nucleus has been identified in the cat, dog, and human.
Synonym(s): nucleus of pudendal nerveTA
[Onufrowicz, Wladislaus, Swiss anatomist.]
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