Vastus Intermedius

Written by Roxanne Salkeld

Last updated January 17, 2023 • 5 Revisions

The vastus intermedius is a muscle in the anterior compartment of the thigh. It forms part of the quadriceps femoris muscle complex.

  • Attachments:
    • Originates from the anterior and lateral surfaces of the femoral shaft.
    • It inserts onto the patella via the quadriceps femoris tendon.
    • The patella is then attached to the tibial tuberosity by the patella ligament.
  • Actions: Extension of the knee joint. It has a secondary function of stabilising the patella.
  • Innervation: Femoral nerve
  • Blood Supply: Lateral circumflex femoral artery

Fig 1
The muscles of the anterior thigh.

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