Anatomy & Physiology: Muscles—Obturator Internus.
Structure.
- Origin: inner surface of obturator foramen pubis, and ischium.
- Insertion: medial surface of greater trochanter of femur.
- Of deep lateral rotator group.
Function.
- Concentric action: accelerates abduction, and external/lateral rotation.
- Reverse mover action: contralateral rotation of pelvis.
- Eccentric action: decelerates adduction and internal/medial rotation.
- Isometric action: stabilization hip and sacroiliac joints.
- Innervation: nerve to obturator internus.
- Arterial supply: superior and inferior gluteal arteries; obturator artery.
Clinical Significance.
More.
- https://www.anatomynext.com/obturator-internus/
- https://www.youtube.com/watch?v=cMQaYCQpXM0
- https://www.youtube.com/watch?v=Jlfkg5xEXS4
Obturator internus. Used with permission by 3D4Medical.
References
Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.
Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.
Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.
Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.
