Nerve to obturator internus
The nerve to obturator internus, also known as the obturator internus nerve, is a nerve that innervates the obturator internus and gemellus superior muscles.
| Nerve to obturator internus | |
|---|---|
 Plan of sacral plexus and pudendal plexus (nerve to the obturator internus and gemellus superior labeled at lower left) | |
 Nerves of the right leg seen from behind (nerve to the obturator internus labeled at upper left) | |
| Details | |
| From | Sacral plexus |
| Innervates | Obturator internus and gemellus superior muscles |
| Identifiers | |
| Latin | Nervus musculi obturatorii interni |
| TA98 | A14.2.07.028 |
| TA2 | 6550 |
| FMA | 78711 |
| Anatomical terms of neuroanatomy | |
Structure
The nerve to obturator internus originates in the lumbosacral plexus.[1] It arises from the ventral divisions of the fifth lumbar and first and second sacral nerves.[1][2]
It leaves the pelvis through the greater sciatic foramen below the piriformis muscle, and gives off the branch to the gemellus superior, which enters the upper part of the posterior surface of the muscle.
It then crosses the ischial spine, re-enters the pelvis through the lesser sciatic foramen, and pierces the pelvic surface of the obturator internus.
References
This article incorporates text in the public domain from page 957 of the 20th edition of Gray's Anatomy (1918)
- Warner, Tyler; Tubbs, R. Shane (2021-01-01), Tubbs, R. Shane; Iwanaga, Joe; Loukas, Marios; Dumont, Aaron S. (eds.), "Chapter 7 - The Nerve to Obturator Internus", Surgical Anatomy of the Sacral Plexus and Its Branches, Elsevier, pp. 31–34, ISBN 978-0-323-77602-8, retrieved 2021-02-06
- Chiva, Luis M.; Magrina, Javier (2018-01-01). "Chapter 2 - Abdominal and Pelvic Anatomy". Abdominal and Pelvic Anatomy. Elsevier. pp. 3–49. doi:10.1016/b978-0-323-42878-1.00002-x. ISBN 978-0-323-42878-1.