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 nerve [TA]
[Onufrowicz, Wladislaus, Swiss anatomist.]
Onufrowicz,Wladislaus, Swiss anatomist, 1836-1900.
Onuf nucleus - small somatic motor neurons in the ventral horn of the spinal cord at level S2.