Obturator externus

  • The obturator externus (also external obturator, external obturator muscle, obturator externus muscle, latin: musculus obturatorius externus) is a triangular shaped muscle of the posterior muscle group of the pelvic girdle.

    Origin

    The obturator externus originates from the external surface of the obturator membrane.

    Insertion

    The obturator externus muscle inserts on the trochanteric fossa of the femur.

    Action

    The major function of the external obturator is the external rotation of the femur.

    Innervation

    The obturator externus is innervated by the obturator nerve that arises from the lumbar plexus.