vastus lateralis

vastus lateralis

(văs′təs lăt′ə-rā′lĭs, -răl′ĭs)
n.
A muscle with origin from the posterior ridge of the femur as far as the greater trochanter, with insertion into the tibia, with nerve supply from the femoral nerve, and whose action extends the leg.

vastus lateralis

the largest of the four muscles of the quadriceps femoris group, situated on the lateral side of the thigh. It is a large, dense mass originating in a broad aponeurosis that is attached to the intertrochanteric line of the femur, the greater trochanter, the lateral lip of the gluteal tuberosity, and the lateral lip of the linea aspera. The fibers of the muscle are gathered to form a strong aponeurosis that converges to become a flat tendon before inserting under the patella and onto the lateral condyle of the tibia. The muscle functions to help extend the leg. Compare rectus femoris, vastus intermedius, vastus medialis. See also quadriceps femoris.
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Vastus lateralis

vastus lateralis

muscle at lateral side of femur; partly fused with vastus intermedius
  • origin lateral side of femur

  • insertion patella, and anterolateral area of knee joint capsule

References in periodicals archive ?
2007) documented significant increases in vastus lateralis fascicle angle (7.
For example, Kamen and Knight (4) reported increases in peak motor unit firing rates for the vastus lateralis during a maximal isometric muscle action after just one testing day/session.
For analysis of the rectus femoris, vastus lateralis, and medialis muscles, the volunteers were seated in a back-supported extensor chair while performing a full extension of the knee associated with the dorsiflexion of the ankle.
The capacity of classic markers for mitochondrial density, ie, the capacity of citrate synthase (CS) and succinate dehydrogenase (SDH), as well the capacity of cytochrome c oxidase (COX) and beta-hydroxyacyl-CoA dehydrogenase (HAD), was determined in homogenized muscle biopsy samples obtained from the vastus lateralis muscle of nonexercising healthy young (age 20 [+ or -] 2 yr) subjects (31 women, 7 men).
Gilleard W, McConnell J and Parsons D (1998): The effect of patellar taping on the onset of vastus medialis obliquus and vastus lateralis muscle activity in persons with patellofemoral pain.
The vastus lateralis, medial hamstrings, tibialis anterior, and medial gastrocnemius were activated about 1.
The vastus lateralis appears hypertrophied; however, the electromyogram pattern is one of disuse atrophy.
An abnormal overpull of the vastus lateralis (outside) muscle portion of the quadriceps against a weak vastus medialis (middle portion).
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.
Lipofuscin accumulation in the vastus lateralis muscle in patients with chronic obstructive pulmonary disease.
Bipolar Ag-AgCl surface electrodes were used for electromyography (EMG) recordings (silver bar electrodes, diameter 10 mm, centre-to-centre distance 20 mm) of the long head of the vastus lateralis and biceps femoris (Data-Log type no.