vastus medialis muscle


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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 ?
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.
A study associating age and modification in fiber types in swine aged 6-18 months revealed that slow fibers decreased in both rectus abdominis and vastus medialis muscles, and slow fibers were more numerous in the vastus medialis muscle.
Two electrodes were placed on the skin 2 to 3 cm above the superior aspect of the patella over the vastus medialis muscle and 30 cm above the patella over the vastus lateralis muscle.
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.
(2005) Mechanomyographic and electromyographic responses of the vastus medialis muscle during isometric and concentric muscle actions.
VM EMGrms ([micro]V/sec) RT-WBV Pre 85.9 (46.2-217.0) Post 138.5 (76.7-388.0) Percent change 1.62 (.7-18.5) RT Pre 67.8 (30.4-181.0) Post 85.3 (31-386.0) Percent change 1.29 (.6-2.1) VL EMGrms Welch's t-test ([micro]V/sec) p-value RT-WBV Pre 41.8 (14.2-194.0) Post 66.2 (31.0-386.0) Percent change 1.57 (.6-2.1) 0.22 RT Pre 39.5 (15.4-123.0) Post 44.5 (20.3-285.0) Percent change 1.16 (.3-3.0) 0.08 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. Table 4.
The present study aimed to analyze the effects of particular vibration parameters on the myoelectric activity of the vastus lateralis and vastus medialis muscle. The frequencies applied were 20 Hz, 40 Hz, 60 Hz, while the amplitudes were 2 mm and 4 mm.