Obturator internus nerve
The nerve to obturator internus 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 |
| TA | A14.2.07.028 |
| FMA | 78711 |
| Anatomical terms of neuroanatomy | |
Course
The nerve to obturator internus originates in the sacral plexus. It arises from the ventral divisions of the fifth lumbar and first and second sacral nerves.
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, reenters 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)
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