What is the main function of the vastus lateralis?

What is the main function of the vastus lateralis?

The muscle is one of the four quadriceps muscles and is the largest muscle of that group. The vastus laterails works with the other quad muscles to help extend your knee joint. It also is active in maintaining thigh and kneecap position while walking and running.

Which of the following is an action of the vastus lateralis?

Description. The vastus lateralis muscle is located on the lateral side of the thigh. This muscle is the largest of the quadriceps which includes: rectus femoris, vastus intermedius, and vastus medialis. Together, the quadriceps act on the knee and hip to promote movement as well as strength and stability.

What is the main function of the vastus medialis?

Function. Vastus medialis, together with the other muscles that make up quadriceps femoris, extends the knee jointand it also contributes to correct tracking of the patella.

What is the action of the vastus muscle group?

Vastus muscles
Insertion Quadriceps tendon
Artery Femoral artery
Nerve Femoral nerve
Actions Extension of knee joint

What is the origin insertion and function of the vastus lateralis?

Vastus lateralis muscle
Vastus lateralis
Origin Greater trochanter, Intertrochanteric line, and Linea aspera of the Femur
Insertion Patella by the Quadriceps tendon and Tibial tuberosity by the Patellar ligament

What is the antagonist to vastus lateralis?

Antagonist: Gastrocnemius, Popliteus, Gracilis, and Sartorius.

What is the origin of the vastus lateralis?

Vastus lateralis It originates via a broad aponeurosis from various sites on the femur, such as the proximal half of the intertrochanteric line, anterior and inferior borders of the greater trochanter, lateral lip of the gluteal tuberosity and proximal half of the lateral lip of linea aspera.

How do the vastus lateralis and vastus medius work together to stabilize the knee joint?

The vastus medialis acts indirectly as a patellar stabilizer, placing its contractile force on the median axis of the femur. The strength expressed by the vastus lateralis increases with the increase in knee flexion. This mechanism is due to the length of the fibers compared to the connective structure of the muscle.

What muscle is the antagonist to the vastus lateralis?

Vastus lateralis muscle
Actions Extends and stabilizes knee
Antagonist Hamstring
Latin Musculus vastus lateralis or musculus vastus externus

Where is vastus lateralis site?

The vastus lateralis site is commonly used for immunizations in infants and toddlers because the muscle is thick and well-developed. This muscle is located on the anterior lateral aspect of the thigh and extends from one hand’s breadth above the knee to one hand’s breadth below the greater trochanter.

Is vastus lateralis an antagonist or agonist?

The agonist-antagonist muscle pairs were vastus lateralis-biceps femoris, vastus medialis-semimembranosus/semitendinosus, vastus medialis-medial gastrocnemius, and semimembranosus/semitendinosus-medial gastrocnemius.

What is the synergist muscle for vastus lateralis?

Synergist: Rectus femoris, vastus intermedius and vastus medialis. Antagonist: Gastrocnemius, Popliteus, Gracilis, and Sartorius. Nerve Supply: Muscular branches of the femoral nerve (L2, L3, and L4).

What Innervates vastus lateralis?

The vastus lateralis is the largest of the quadriceps muscles. It receives motor innervation through a branch of the fem- oral nerve, namely the MNVL.

Is vastus medialis agonist or antagonist?

What does vastus lateralis mean?

: the division of the quadriceps muscle that covers the outer anterior aspect of the femur, arises chiefly from the femur, and inserts into the outer border of the patella by a flat tendon which blends with that of the other divisions of the muscle and sends an expansion to the capsule of the knee.

Is the vastus lateralis a flexor?

The Background The Quadriceps – Rectus Femoris, Vastus Lateralis, Vastus Intermedius, and Vastus Medialis. The hip flexors is typically a term referring to two muscles – iliacus and psoas major – and both these muscles as a group are also sometimes referred to as the iliopsoas.

Function of the Vastus Lateralis The main function of the vastus lateralis is to extend the knee, moving the lower leg forward. This muscle also helps to stabilize the knee joint and is vital in enabling the body to rise up from a squatting position.

What supplies blood to the vastus lateralis?

Blood Supply. Vastus lateralis is primarily supplied by lateral circumflex artery, a branch of femoral artery. Femoral artery branches in thigh profunda femoris. medial femoral circumflex. lateral femoral circumflex lateral to rectus femoris.

What is the vastus lateralis sweep?

The quad outer sweep is a highly sought-after look especially in the sport of bodybuilding where this curved and defined quad can make a big difference in the appearance of the lower body musculature. Strong and healthy leg muscles have numerous benefits, the vastus lateralis is no exception.

What nerve innervates the vastus lateralis?

Nerve innervation to the vastus lateralis is the femoral nerve arising from lumbar level two, three, and four. Blood supply to the muscle is via the lateral circumflex femoral artery.