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External hindlimb muscle

 
, medical expert
Last reviewed: 07.07.2025
 
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The external obturator muscle (m.obturatorius externus) is triangular in shape, originates on the outer surface of the pubic bone and the branch of the ischium, as well as on the medial two-thirds of the obturator membrane. The muscle bundles converge and are directed backward, laterally and upward. The tendon of the muscle passes behind the hip joint and is attached to the trochanteric fossa of the femur and to the joint capsule.

Function of the external obturator muscle: rotates the thigh outward.

Innervation of the external obturator muscle: obturator nerve (LII-LIV).

Blood supply of the external obturator muscle: obturator artery, lateral circumflex femoral artery.

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