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image: Obturator Internus
Obturator Internus

Obturator Internus

 Action :

  • Rotates the thigh laterally; also helps abduct the thigh when it is flexed.

Origin :

  • Internal surface of obturator membrane and posterior bony margins of obturator foramen.

Insertion :

  • Medial surface of greater trochanter of femur, in common with superior and inferior gemelli.

Innervation :

  • Nerve to the obturator internus and superior gemellus − a branch of the sacral plexus (L5, S1).

Arterial Supply :

  • Internal pudendal, superior and inferior gluteal arteries.

Depth :

  • Superficial
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