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Obturator Internus
Region: Hip & Thigh Muscles · All hip & thigh muscles
Obturator Internus at a glance
| Origin | Inner surface of the obturator membrane and surrounding pelvic bone |
|---|---|
| Insertion | Medial surface of the greater trochanter of the femur (with the gemelli) |
| Actions | Rotates the thigh outward; Steadies the femoral head in its socket |
| Nerve supply | Nerve to obturator internus (L5–S2) |
◆ Good to know
Its tendon makes a right-angle turn out of the pelvis through the lesser sciatic foramen, using the bone as a pulley.
More Hip & Thigh Muscles
Please note: This page is an anatomy education summary for students and curious readers, not medical advice. Attachment points are given in their classic short form; individual anatomy varies, and detailed dissection-level descriptions belong in an anatomy atlas.