Obturator Internus
Original Editor - Manisha Shrestha
Top Contributors - Manisha Shrestha and Kim Jackson
Description[edit | edit source]
The obturator internus is the deep muscle of hip joint which is part of lateral wall of pelvis. It is found in the superior inner side of the obturator membrane.[1]
Origin[edit | edit source]
The obturator internus muscle originates from the inferior margin of the superior pubic ramus and from the pelvic surface of the obturator membrane.[1]
Insertion[edit | edit source]
Its tendon exits the pelvis through the lesser sciatic foramen to insert onto the greater trochanter of the femur.[1]
Nerve[edit | edit source]
This muscle is innervated by the obturator internus nerve (L5–S2), a branch of sacral plexus.[1]
Artery[edit | edit source]
Function[edit | edit source]
- Laterally/ externally rotates the hip
- Abduction of hip
- Hip joint stabilizer(only when torques are applied in the specific directions in which the muscle is active.)[3]
Clinical Relevance[edit | edit source]
Assessment[edit | edit source]
Treatment[edit | edit source]
Resources[edit | edit source]
- ↑ 1.0 1.1 1.2 1.3 Ramirez PT, Frumovitz M, Abu-Rustum NR. Principles of Gynecologic Oncology Surgery E-Book. Elsevier Health Sciences; 2018 Jul 1.(pp.3-49)
- ↑ Kenhub - Learn Human Anatomy. Obturator internus. Available from: https://www.youtube.com/watch?v=WqufrPruEMc [last assessed: 2019/12/30]
- ↑ Hodges PW, McLean L, Hodder J. Insight into the function of the obturator internus muscle in humans: observations with development and validation of an electromyography recording technique. Journal of Electromyography and Kinesiology. 2014 Aug 1;24(4):489-96.
- ↑ Solomon LB, Lee YC, Callary SA, Beck M, Howie DW. Anatomy of piriformis, obturator internus and obturator externus: implications for the posterior surgical approach to the hip. The Journal of bone and joint surgery. British volume. 2010 Sep;92(9):1317-24.
- ↑ Byrne C, Alkhayat A, O'Neill P, Eustace S, Kavanagh E. Obturator internus muscle strains. Radiology Case Reports. 2017 Mar 1;12(1):130-2.
