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Vastus intermedius

The vastus intermedius (also vastus intermedius muscle, latin: musculus vastus intermedius) is one of the muscles forming the quadriceps femoris. The vastus intermedius is located in the anterior region of the thigh below the rectus femoris and between the vastus medialis and lateralis.

Origin

The vastus intermedius originates from the upper two-thirds of the anterior surface of the femur.

Insertion

The vastus intermedius inserts along with the other muscles of the quadriceps femoris onto the tibial tuberosity.

Action

The main function of the vastus intermedius is extension of the knee.

Innervation

The vastus intermedius is innervated by the femoral nerve.