Vastus Medialis Muscle
Vastus medialis is one of the three vastus muscles present in the anterior thigh as a component of quadriceps. As name indicates, it is present on the medial aspect of the thigh. It is the most inner of the quadriceps muscles. It is a long muscle and traverses the whole length of the thigh to the knee. This muscle becomes fully strengthened on extension of the leg at the knee joint.
read moreSoleus Muscle Gastrocnemius Muscle Adductor Muscle Semitendinosus Muscle Biceps Femoris Muscle Iliotibial Tract Gluteus Medius Muscle Gluteus Maximus Muscle Peroneus Longus Muscle Extensor Digitorum Longus Muscle Tibialis Anterior Muscle Vastus Medialis Muscle Vastus Lateralis Muscle Rectus Femoris Muscle Pectineus Muscle Sartorius Muscle Gracilis Muscle Adductor Longus Muscle
Vastus Medialis Muscle
ORIGIN AND INSERTION
Vastus medialis originates from medial lip of linea aspera and intertrochanteric line of femur. The insertion of this muscle is onto the base of patella via common tendinous attachments (quadriceps tendons). It also attaches distally to the tibial tuberosity by patellar ligament.
NERVE SUPPLY
Femoral nerve (L2, L3, and L4) is the source of nervous supply to this muscle through muscular branches that penetrate and innervate the muscle.
BLOOD SUPPLY
Vastus medialis is supplied arterially by femoral artery, superior medial genicular branch of popliteal artery and profunda femoris artery.
FUNCTIONS
It plays important role in extending the leg at the knee joint. It also supports the extended leg to make it steady and stable.
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