Abstract:
:Here we describe the nerves innervating the perineal skin together with their sensory fields in the adult female rat. Electrophysiological recording showed that the lumbosacral and L6-S1 trunks, in part by way of the sacral plexus, transmit sensory information from the perineal skin via four nerves: the viscerocutaneous branch of the pelvic nerve innervating the skin at the midline between the vaginal opening and anus, the sensory branch of the pudendal nerve innervating the clitoral sheath, the distal perineal branch of the pudendal nerve innervating a broad area of skin adjacent to the vaginal opening and anus, and the proximal perineal branch of the sacral plexus innervating a broad area of skin adjacent to the clitoris and vaginal opening. The sensory fields of three of these nerves overlapped to some degree: the viscerocutaneous branch of the pelvic and the distal perineal branch of the pudendal nerves at the midline skin between the vaginal opening and the anus, and the distal perineal branch of the pudendal nerve and the proximal perineal branch of the sacral plexus at the skin lateral to the vaginal opening. Such overlap might provide a safeguard helping to ensure that somatosensory input from the perineal region important for triggering reproductive and nonreproductive reflexes reaches the CNS.
journal_name
Brain Resjournal_title
Brain researchauthors
Cruz Y,Zempoalteca R,Angelica Lucio R,Pacheco P,Hudson R,Martínez-Gómez Mdoi
10.1016/j.brainres.2004.07.046subject
Has Abstractpub_date
2004-10-22 00:00:00pages
97-103issue
1-2eissn
0006-8993issn
1872-6240pii
S0006-8993(04)01201-6journal_volume
1024pub_type
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