Nerve to the Piriformis

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Nerve: Nerve to the Piriformis
Plan of sacral plexus and pudendal plexus. (Label "to piriformis" is at center left.)
Image:Posterior Hip Muscles 1.PNG
The piriformis and nearby muscles
Latin	nervus musculi piriformis
Gray's	subject #213 957
Innervates	piriformis muscle
From	sacral plexus (S1–S2)
Dorlands / Elsevier	n_05/12566208

The nerve to piriformis is a nerve that innervates the piriformis muscle.

Course

The nerve to piriformis originates in the sacral plexus. It arises from the dorsal division of the second sacral nerve, or the dorsal divisions of the first and second sacral nerves, and enters the anterior surface of the piriformis muscle; this nerve may be double.

See also

• Piriformis

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 As such, some of the information contained herein may be outdated.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.

v • d • e Nerves of lower limbs and lower torso: the lumbosacral plexus (L1-Co)
lumbar plexus (L1-L4)	iliohypogastric: lateral cutaneous branch - anterior cutaneous branch ilioinguinal: anterior scrotal ♂/labial ♀ genitofemoral: femoral branch/lumboinguinal - genital branch lateral cutaneous of thigh: patellar obturator: anterior (cutaneous) - posterior - accessory femoral: anterior cutaneous branches - saphenous (infrapatellar, medial crural cutaneous)
sacral plexus (L4-S4)	sciatic common fibular: lateral sural cutaneous (sural communicating branch) - deep fibular (lateral terminal branch, medial terminal branch, dorsal digital) - superficial fibular (medial dorsal cutaneous, intermediate dorsal cutaneous, dorsal digital) tibial: medial sural cutaneous - medial calcaneal - medial plantar (common plantar digital nerves, proper plantar digital) - lateral plantar (deep branch, superficial branch, common plantar digital, proper plantar digital) sural: lateral dorsal cutaneous - lateral calcaneal other muscular: superior gluteal/inferior gluteal - lateral rotator group (to quadratus femoris, to obturator internus, to the piriformis) cutaneous: posterior cutaneous of thigh (inferior cluneal, perineal branches) - perforating cutaneous
coccygeal plexus (S4-Co)	pudendal: inferior anal - perineal (deep, posterior scrotal ♂/labial ♀) - dorsal of the penis ♂/clitoris ♀ anococcygeal
cutaneous innervation of the lower limbs

Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .