Posterior cutaneous nerve of thigh
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2008-01-25T05:19:59Z
Arcadian
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clean up - image, Replaced: Gray432.png → Gray432 color.png using [[Project:AutoWikiBrowser|AWB]]
{{Infobox Nerve |
Name = {{PAGENAME}} |
Latin = nervus cutaneus femoris posterior |
GraySubject = 213 |
GrayPage = 959 |
Image = Gray432 color.png |
Caption = Cross-section through the middle of the [[thigh]]. (Posterior femoral cutaneous nerve labeled at bottom.) |
Image2 = Gray832.png |
Caption2 = Nerves of the right lower extremity. Posterior view. (Post. fem. cutaneus labeled at upper left.) |
Innervates = |
BranchFrom = [[sacral plexus]] (S1-S3) |
BranchTo = [[inferior clunial nerves]], [[perineal branches of posterior femoral cutaneous nerve|perineal branches]] |
MeshName = |
MeshNumber = |
DorlandsPre = n_05 |
DorlandsSuf = 12565565 |
}}
The '''posterior cutaneous nerve of the thigh''' (also called the '''posterior femoral cutaneous nerve''') provides innervation to the [[skin]] of the posterior surface of the [[thigh]] and [[leg]], as well as to the skin of the [[perineum]].
==Structure==
The posterior cutaneous nerve of the thigh is a nerve from the [[sacral plexus]]. It arises partly from the dorsal divisions of the first and second, and from the ventral divisions of the second and third sacral nerves, and issues from the pelvis through the [[greater sciatic foramen]] below the [[piriformis]] muscle.
It then descends beneath the [[gluteus maximus]] with the [[inferior gluteal artery]], and runs down the back of the thigh beneath the [[fascia lata]], and over the long head of the [[biceps femoris]] to the back of the knee; here it pierces the [[deep fascia]] and accompanies the [[small saphenous vein]] to about the middle of the back of the leg, its terminal twigs communicating with the [[sural nerve]].
===Branches===
Its branches are all cutaneous, and are distributed to the gluteal region, the perineum, and the back of the thigh and leg.
* The [[inferior clunial nerves]] (or gluteal branches), three or four in number, turn upward around the lower border of the [[gluteus maximus]], and supply the skin covering the lower and lateral part of that muscle.
* The [[perineal branches of posterior femoral cutaneous nerve|perineal branches]] are distributed to the skin at the upper and medial side of the [[thigh]].
* The main part to the back of the thigh and leg consists of numerous filaments derived from both sides of the nerve, and distributed to the skin covering the back and medial side of the thigh, the [[popliteal fossa]], and the upper part of the back of the leg.
==Additional images==
<gallery>
Image:Gray825and830.PNG|Cutaneous nerves of the right lower extremity. Front and posterior views.
Image:Gray826and831.PNG|Cutaneous nerves of the right lower extremity. Front and posterior views.
</gallery>
==External links==
* {{DukeOrtho|posterior_femoral_cutaneous_nerve}}
* {{eMedicineDictionary|posterior+cutaneous+nerve+of+thigh}}
{{Gray's}}
{{Lumbosacral plexus}}
[[Category:Peripheral nervous system]]
[[de:Nervus cutaneus femoris posterior]]