obturator foramen...펌

It is bounded by a thin, uneven margin, to which a strong membrane is attached, and presents, superiorly, a deep groove, the obturator groove, which runs from the pelvis obliquely medialward and downward.

This groove is converted into the obturator canal by a ligamentous band, a specialized part of the obturator membrane, attached to two tubercles:

• one, the posterior obturator tubercle, on the medial border of the ischium, just in front of the acetabular notch
• the other, the anterior obturator tubercle, on the obturator crest of the superior ramus of the pubis

Through the canal the obturator artery, obturator vein and obturator nerve pass out of the pelvis.