Perforating cutaneous nerve
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The perforating cutaneous nerve is a cutaneous nerve of the sacral plexus that provides sensory innervation to the skin of the buttocks.[2]
| 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 | |
| From | S2-S3,[1] sacral plexus |
| Innervates | Gluteal sulcus |
| Identifiers | |
| Latin | nervus cutaneus perforans |
| TA98 | A14.2.07.036 |
| TA2 | 6546 |
| FMA | 19040 |
| Anatomical terms of neuroanatomy | |
Structure
Origin
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
It pierces the inferior part of the sacrotuberous ligament,[4] then passes along the inferior border of the gluteus maximus muscle.[4][2]
Distribution
The perforating cutaneous nerve innervates the skin that overlies the inferomedial portion of gluteus maximus muscle.[3]
Variation
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
References
External links
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