vastus medialis muscle


Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to vastus medialis muscle: Extensor hallucis longus muscle

vas·tus me·di·a·lis mus·cle

(vas'tŭs mē-dē-ā'lis mŭs'ĕl)
Origin, medial lip of linea aspera; insertion, tibial tuberosity by way of common tendon of quadriceps femoris and ligamentum patellae; action, extends leg; nerve supply, femoral.
Synonym(s): medial vastus muscle.

vastus medialis muscle

Thigh muscle. Origin: medial side of femur Insertion: common tendon of quadratus muscles, tibial tuberosity via patellar ligament. Nerve: femoral (L2-L4). Action: extends leg.
See also: muscle
References in periodicals archive ?
Muscle strength and length tests were normal for muscles crossing the knee and hip joints, although hypotrophy in both vastus medialis muscles could be noticed through palpation.
5 x 10 cm): One electrode was placed on the skin 2 to 3 cm above the superior aspect of the patella over the vastus medialis muscle, and the other electrode was placed lateral to and 30 cm above the patella over the vastus lateralis muscle.
Additional factors that may contribute to recurrent dislocation of the patella include a change in orientation of the fibers of the vastus medialis muscle, atrophy of the vastus medialis, hypertrophy of the vastus lateralis, and generalized ligamentous laxity.
2005) Mechanomyographic and electromyographic responses of the vastus medialis muscle during isometric and concentric muscle actions.
The vastus medialis muscle is important for locking the knee in terminal extension and preventing the patellar drift and lateral subluxation that could possibly be caused by the pull of the vastus lateralis.
08 EMGrms, electromyography root-mean-square; RT-WBV, resistance training with whole-body vibra-tion; RT, resistance training; VL, vastus lateralis muscle; VM, vastus medialis muscle.