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O: femoral medial epicondyle.
I: two insertions. Conjoins into semimembranosus tendon & posteromedial crest of tibia.
N: medial articular nerve (branch of the saphenous nerve).
V: branches of superior and inferior genicular arteries.
A: reinforce medial portion of articular capsule of knee; stabilize medial knee; primary static stabilizer. Limits anterior movement of tibia and prevents hyperextension. Superficial, sMCL, MCL is a knee valgus stabilizer. Deep, dMCL, MCL is rotational stabilizer.
References
Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.
Cedars-Sinai. (2018). Vertebrae of the spine. Retrieved from https://www.cedars-sinai.org/health-library/diseases-and-conditions/v/vertebrae-of-the-spine.html
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.