Perforating_cutaneous_nerve
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 | |
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]
- 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.
- Sinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). p. 310. ISBN 978-0-7295-3752-0.
- 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.
- 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.
