Dr. Ebraheim’s educational animated video describes the anatomy of the obturator externus muscle.
The obturator externus is one of the six short external rotators of the hip.
Origin: it arises from the obturator foramen and the obturator membrane.
Insertion: it inserts into the trochanteric fossa of the femur.
Action: it laterally rotates and adducts the thigh.
Innervation: the obturator externus muscle is innervated by the posterior division of the obturator nerve.
Six short external rotators of the hip:
2-Superior gemellus muscle.
3-Obturator internus muscle.
4-Inferior gemellus muscle.
5-Obturator externus muscle.
6-Quadratus femoris muscle.
The short external rotators are used to protect the sciatic nerve. The sciatic nerve will be behind these muscles.
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