Vastus intermedius muscle
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The vastus intermedius muscle is one of the four quadriceps muscles in the anterior compartment of the thigh. It is located inferior to the rectus femoris muscle and between the vastus medialis and vastus lateralis muscles.
origin: upper two-thirds of the anterior and lateral surfaces of the femur
lateral margin of patella
lateral condyle of tibia
action: extends the leg at the knee joint
innervation: femoral nerve (L2 - L4)
The vastus intermedius muscle originates from the upper two-thirds of the anterior and lateral surfaces of the femur.
Like the other muscles forming the quadriceps femoris, the vastus intermedius muscle also extends the leg at the knee joint.
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