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Spinal neurons involved in the urethrogenital reflex have been identified.
2003 SEP 4 - (NewsRx.com & NewsRx.net) -- Spinal neurons involved in the urethrogenital reflex have been identified in female rats.
"The urethrogenital (UG) reflex is a spinal sexual reflex that consists of autonomic and somatic nerve activity and vaginal, uterine, and anal sphincter contractions. The UG reflex is under tonic descending inhibition by neurons in the region of the nucleus paragigantocellularis (nPGi). The location of spinal neurons activated by the UG reflex was examined in the female rat using the immediate early gene, c-fos," scientists in the United States reported.
"In addition, the descending inputs from the nPGi onto fos-activated neurons was examined using the anterograde tracer biotin dextran amine injected into the nPGi," said L. Marson and colleagues, University of North Carolina, Division of Urology.
"The UG reflex resulted in a significant increase in fos-positive nuclei in segments T12-S1, compared with experimental controls in which the UG reflex was not activated. Spinal circuits involved in the UG reflex include neurons relaying afferent information from the pudendal sensory nerve, in the dorsal horn and medial cord of L5-Sl."
"Efferent output includes preganglionic neurons located in the lateral gray of L5-S1 and lateral and medial gray of T13-L2. Spinal interneurons involved ...
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Source: HighBeam Research, Spinal neurons involved in the urethrogenital reflex have been...