Obturator externus muscle

Last revised by Reabal Najjar on 14 Dec 2022

The obturator externus is a flat, triangular muscle, which covers the outer surface of the anterior wall of the pelvis.

Summary

  • origin: external surface of obturator membrane and adjacent bone (inferior pubic ramus and the ramus of the ischium)

  • insertion: trochanteric fossa of femur

  • blood supplyobturator and medial circumflex femoral arteries

  • innervationobturator nerve (L2 - L4)

  • action: thigh external rotation, stabilization of hip joint

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