Articularis genus muscle

The articularis genus (subcrureus) is a small skeletal muscle located anteriorly on the thigh just above the knee.

Articularis genus muscle
Anterior surface of right femur. Origin of articularis genus labelled at bottom middle of image.
Insertionsuprapatellar bursa
Arteryfemoral artery
Nervefemoral nerve
ActionsPulling the suprapatellar bursa during extension of the knee.
LatinMusculus articularis genus
Anatomical terms of muscle


It arises from the anterior surface of the lower part of the body of the femur,[1] deep to the vastus intermedius,[2] close to the knee and from the deep fibers of the vastus intermedius.[1]

Its insertion is on the synovial membrane of the knee-joint.[1]

Blood supply

It is supplied by the lateral femoral circumflex artery.[1]


It is innervated by branches of the femoral nerve (L2-L4).[1]


Flat, wispy and highly variable,[3] sometimes consisting of several separate muscular bundles,[4] this muscle is without a distinct investing fascia and ranges 1.5–3 cm in width.[3]

It is usually distinct from the vastus intermedius, but occasionally blended with it.[4]


Articularis genus pulls the suprapatellar bursa superiorly during extension of the knee,[2] and prevents impingement of the synovial membrane between the patella and the femur.[1]


This article incorporates text in the public domain from page 471 of the 20th edition of Gray's Anatomy (1918)

  1. "Thigh to Foot Musculature". PT Central. Archived from the original on 15 July 2010. Retrieved 2010-08-17.
  2. Agur, A. M. R.; Dalley, Arthur F. (2009). Grant's atlas of anatomy. Lippincott Williams & Wilkins. p. 414. Retrieved 2010-08-17.
  3. B Reider; JL Marshall; B Koslin; B Ring; FG Girgis (1981). "The anterior aspect of the knee joint" (PDF). J Bone Joint Surg Am. 1981;63:351-356. Retrieved 2010-08-17.
  4. Gray, Henry (1918). "The Muscles and Fasciæ of the Thigh". Yahoo Education. Archived from the original on 2009-12-22. Retrieved 2010-08-17.
  • Farshchian's Orthopedic Regenerative Series: The Knee; Articularis Genus (very clear illustration)
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