vastus medialis


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vastus medialis

(mē′dē-ā′lĭs, -ăl′ĭs)
n.
A muscle with origin from the shaft of the femur, with insertion into the tibial tuberosity, with nerve supply from the femoral nerve, and whose action extends the leg.

vastus medialis

one of the four muscles of the quadriceps femoris group, situated in the medial part of the thigh. It originates from the intertrochanteric line of the femur, the linea aspera, the medial supracondylar line, the tendons of the adductor longus and the adductor magnus, and the medial intermuscular septum. The vastus medialis extends to the lower anterior aspect of the thigh and inserts by an aponeurosis under the patella as part of the quadriceps femoris tendon and onto the medial condyle of the femur. An expansion of the aponeurosis passes to the capsule of the knee joint. The muscle functions in combination with other parts of the quadriceps femoris to extend the leg. Also called vastus internus. Compare rectus femoris, vastus intermedius, vastus lateralis. See also quadriceps femoris.
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Vastus medialis
References in periodicals archive ?
The effect of patellar taping on the onset of vastus medialis obliquus and vastus lateralis muscle activity in persons with patellofemoral pain.
Kinesiotaping was applied to Group 1 with vastus medialis obliquus facilitation and patellar functional correction (Figure 1).
The confirmed causes of PF instability are: improper position of bone structures of lower extremity (patella alta, trochlear or patellar dysplasia, misalignment of the leg, rotational deformities of femur and tibia), as well as soft tissue disorders (atrophy of vastus medialis obliquus muscle, medial retinaculum laxity, overtightened lateral retinaculum and MPFL injury) [5, 6, 12, 14].
The electrodes were placed on the long head biceps femoris, vastus lateralis and vastus medialis following EMG for non-invasive assessment of muscle recommendations (Hermens, 2000).
Rehabilitation protocols aim to promote the balance between the portions of the quadriceps muscle, by selective strengthening of the Vastus Medialis Oblique (VMO), however, there is no consensus in the literature regarding the best way to recruit the VMO.
The medial parapatellar approach lacks an internervous plane but utilizes an intermuscular plane between the vastus medialis obliquus (VMO) and rectus femoris (Table 1).
The vastus lateralis (VL) and vastus medialis (VM) are among the most commonly studied muscles in kinesiology.
19] Potential contributing factors that have been studied are vastus medialis oblique insufficiency, decreased quadriceps, hamstrings, and ilitibial band flexibility, femoral anteversion, increased quadriceps angle, and patellar hypermobility.
McBride, Cormie, and Deane (8) reported greater EMG activity in the vastus lateralis and the vastus medialis during the isometric free squat on two balance disks with similar muscle activation for the biceps femoris and medial head of the gastrocnemius.
9-10) Abnormal vastus medialis oblique/vastus lateralis reflex timing has also been considered; however this is proving to be less significant than first theorized according to recent systematic reviews.
Soft tissue abnormalities, such as generalized ligamentous laxity, torn medial patellofemoral ligament, or a weakened vastus medialis obliquus, may cause or result in instability.