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Perforating cutaneous nerve

From Wikipedia, the free encyclopedia
Perforating cutaneous nerve
Plan of sacral and pudendal plexuses.
Cutaneous nerves of the right lower extremity. Front and posterior views. (Perforating cutaneous nerve not labeled, but region visible.)
Details
FromS2-S3,[1] sacral plexus
InnervatesGluteal sulcus
Identifiers
Latinnervus cutaneus perforans
TA98A14.2.07.036
TA26546
FMA19040
Anatomical terms of neuroanatomy

The perforating cutaneous nerve is a cutaneous nerve of the sacral plexus that provides sensory innervation to the skin of the buttocks.[2]

Structure

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Origin

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The perforating cutaneous nerve typically[3] arises from the posterior divisions of[4] anterior rami of sacral spinal nerves S2 and S3 of the sacral plexus.[3]

Course

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It pierces the inferior part of the sacrotuberous ligament,[4] then passes along the inferior border of the gluteus maximus muscle.[4][2]

Distribution

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The perforating cutaneous nerve innervates the skin that overlies the inferomedial portion of gluteus maximus muscle.[3]

Variation

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Origin

The perforating cutaneous nerve may arise from the pudendal nerve. It is occasionally united with the pudendal nerve at its origin.[3]

It may be absent (this is the case in 36% of individuals) in which case it is replaced by a branch from either the posterior cutaneous nerve of thigh or from the anterior rami of either S3-S4 or S4-S5.[3]

Course

Instead of piercing the sacrotuberous ligament, the perforating cutaneous may instead run with the pudendal nerve, or pass in between the sacrotuberous ligament and the gluteus maximus muscle.[3]

See also

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References

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  1. ^ Adam Mitchell; Drake, Richard; Gray, Henry David; Wayne Vogl (2005). Gray's anatomy for students. Elsevier/Churchill Livingstone. p. 423. ISBN 0-443-06612-4.
  2. ^ a b Sinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). p. 310. ISBN 978-0-7295-3752-0.
  3. ^ a b c d e f Apaydin, Nihal (2015). "Chapter 47 - Variations of the Lumbar and Sacral Plexuses and Their Branches". Nerves and Nerve Injuries (1: History, Embryology, Anatomy, Imaging, and Diagnostics ed.). Academic Press. p. 635. doi:10.1016/B978-0-12-410390-0.00049-4. ISBN 978-0-12-410390-0.
  4. ^ a b c Mirjalili, S. Ali (2015). "Chapter 46 - Anatomy of the Sacral Plexus L4-S4". Nerves and Nerve Injuries. Vol. 1: History, Embryology, Anatomy, Imaging, and Diagnostics. Academic Press. p. 626. doi:10.1016/B978-0-12-410390-0.00048-2. ISBN 978-0-12-410390-0.
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