The piriformis nerve, also known as the nerve to piriformis, is the peripheral nerve that provides motor innervation to the piriformis muscle.
| Piriformis nerve | |
|---|---|
 Diagram of sacral plexus and pudendal plexus. (Label "to piriformis" is at center left.) | |
 The piriformis and nearby muscles | |
| Details | |
| From | Sacral plexus (S1–S2) |
| Innervates | Piriformis muscle |
| Identifiers | |
| Latin | nervus musculi piriformis |
| TA98 | A14.2.07.029 |
| TA2 | 6545 |
| FMA | 16509 |
| Anatomical terms of neuroanatomy | |
Structure
editOrigin
editThe nerve to piriformis is a branch of the sacral plexus.[1][2] It (typically[3]) arises from the posterior divisions[4]/branches[3] of anterior rami of S1 and S2.[1][2][3][5]
Course
editIt enters the anterior surface of the piriformis muscle.[3][6]
Variation
editOrigin
It may sometimes arise from the anterior ramus of S2 only.[3]
Number
It may be doubled. An additional branch may arise from the superior gluteal nerve.[3]
Distribution
editThe piriformis nerve innervates the piriformis muscle.[1]
See also
editReferences
edit
This article incorporates text in the public domain from page 957 of the 20th edition of Gray's Anatomy (1918)
- ^ a b c Pan, Jason; Vasudevan, John (2018-01-01), Freedman, Mitchell K.; Gehret, Jeffrey A.; Young, George W.; Kamen, Leonard B. (eds.), "Chapter 24 - Piriformis Syndrome: A Review of the Evidence and Proposed New Criteria for Diagnosis", Challenging Neuropathic Pain Syndromes, Elsevier, pp. 205–215, ISBN 978-0-323-48566-1, retrieved 2021-02-03
- ^ a b Khan, Dost; Nelson, Ariana (2018). "67 - Piriformis Syndrome". Essentials of Pain Medicine. Elsevier. pp. 613–618. doi:10.1016/B978-0-323-40196-8.00067-X. ISBN 978-0-323-40196-8.
- ^ 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. Vol. 1: History, Embryology, Anatomy, Imaging, and Diagnostics. Academic Press. p. 634. doi:10.1016/B978-0-12-410390-0.00049-4. ISBN 978-0-12-410390-0.
- ^ Mirjalili, S. Ali (2015-01-01), Tubbs, R. Shane; Rizk, Elias; Shoja, Mohammadali M.; Loukas, Marios (eds.), "Chapter 46 - Anatomy of the Sacral Plexus L4-S4", Nerves and Nerve Injuries, San Diego: Academic Press, pp. 619–626, doi:10.1016/b978-0-12-410390-0.00048-2, ISBN 978-0-12-410390-0, retrieved 2021-02-28
- ^ Mirjalili, S. Ali (2015-01-01), Tubbs, R. Shane; Rizk, Elias; Shoja, Mohammadali M.; Loukas, Marios (eds.), "Chapter 46 - Anatomy of the Sacral Plexus L4-S4", Nerves and Nerve Injuries, San Diego: Academic Press, pp. 619–626, doi:10.1016/b978-0-12-410390-0.00048-2, ISBN 978-0-12-410390-0, retrieved 2021-02-28
- ^ Mirjalili, S. Ali (2015-01-01), Tubbs, R. Shane; Rizk, Elias; Shoja, Mohammadali M.; Loukas, Marios (eds.), "Chapter 46 - Anatomy of the Sacral Plexus L4-S4", Nerves and Nerve Injuries, San Diego: Academic Press, pp. 619–626, doi:10.1016/b978-0-12-410390-0.00048-2, ISBN 978-0-12-410390-0, retrieved 2021-02-28
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