Vastus Medialis - Muscle Physiology & Functional Anatomy


Vastus Medialis  Muscle





  • Medial surface of femur (lower intertrochanteric line, spiral line, medial linea aspera & medial intermuscular septum)


  • Medial patella (via ligamentum patellae into tubercle of tibia)

Major Arteries:

  • Lateral femoral circumflex artery


Neural Innervation:

  • Femoral nerve


Trigger Points:

Vastus Medialis Trigger Points





Concentric Functions:

  • Knee extension


Eccentric Functions:

  • Decelerates knee flexion, abduction & internal rotation


Isometric Function:

  • Dynamically stabilizes the knee during functional movements

  • Stabilizes patella


Related Muscles








More Images of the Vastus Medialis Muscle

vastus medialis

Cross Section of Vastus Medialis Muscle

More Information about the Vastus Medialis Muscle

The vastus medialis muscle is one of the 4 muscles in the quadriceps femoris muscle group which also includes the vastus lateralis, vasus intermedius and biceps femoris.  The vastus medialis is commonly referred to as the "teardrop" muscle.


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