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Biological: Behavioural genetics · Evolutionary psychology · Neuroanatomy · Neurochemistry · Neuroendocrinology · Neuroscience · Psychoneuroimmunology · Physiological Psychology · Psychopharmacology (Index, Outline)
| Nerve: Perineal nerve | ||
|---|---|---|
 | ||
| Sacral plexus of the right side. (Perineal nerve visible at center right.) | ||
| [[Image:|250px|center|]] | ||
| Latin | nervi perineales | |
| Gray's | subject #213 968 | |
| Innervates | Transversus perinei superficialis Bulbospongiosus Ischiocavernosus | |
| From | pudendal nerve | |
| To | ||
| MeSH | [1] | |
The perineal nerve is a nerve arising from the pudendal nerve that supplies the perineum.
Structure[]
The perineal nerve is the inferior and larger of the two terminal branches of the pudendal nerve, is situated below the internal pudendal artery.
It accompanies the perineal artery and divides into two branches:
| Branch | Description |
| "Superficial", or "posterior scrotal" branches (called "labial" in women) | See Posterior scrotal nerves for details. |
| "Deep", or "muscular" branches | The muscular branches are distributed to the superficial transverse perineal muscle, bulbocavernous, ischiocavernosus, and Constrictor urethræ.
A branch, the nerve to the bulb, given off from the nerve to the bulbocavernosus, pierces this muscle, and supplies the corpus cavernosum, ending in the mucous membrane of the urethra. |
External links[]
- SUNY Labs 41:10-0100 - "The Female Perineum: The Perineal Nerve"
- State University of New York (SUNY) Anatomy Image 9174
- State University of New York (SUNY) Anatomy Image 9187
- Dictionary at eMedicine perineal+nerves
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
lumbar plexus: iliohypogastric - ilioinguinal - genitofemoral (femoral branch/lumboinguinal, genital branch) - lateral cutaneous of thigh (patellar) - obturator (anterior, cutaneous, posterior, accessory) - femoral (anterior cutaneous branches, saphenous)
sacral/coccygeal plexus: to quadratus femoris - to obturator internus - to the piriformis - superior gluteal - inferior gluteal - posterior cutaneous of thigh (inferior cluneal, perineal branches)
sciatic: tibial (medial sural cutaneous, sural, medial calcaneal, medial plantar, lateral plantar) - common fibular (lateral sural cutaneous, deep fibular, superficial fibular, medial dorsal cutaneous, intermediate dorsal cutaneous)
pudendal plexus: perforating cutaneous - pudendal (dorsal of the penis/clitoris, inferior anal, perineal and posterior scrotal/labial) - anococcygeal
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