Structure.
- Origin: ischial spine.
- Insertion: lower sacrum and upper coccyx.
Function.
- Concentric action: support/maintain position of pelvic viscera; resists increase in intra-abdominal pressure (during forced exhalation coughing, vomiting, urination, defecation, childbirth); constrict anus, urethra, and vagina.
- Isometric action:
- Innervation: sacral spinal nerves S4-S5.
- Arterial supply: inferior gluteal artery.
Clinical Significance.
More.
- https://www.imaios.com/en/e-Anatomy/Anatomical-Parts/Ischiococcygeus-Coccygeus
- https://youtu.be/ZqGzXp8AeN0
Ischiococcygeus. 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.
