Pelvis. Obturator foramen is 7.
Symphysis pubis exposed by a coronal section. Obturator canal labelled at center.
|Anatomical terms of bone|
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.
- 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
Reflecting the overall sex differences between male and female pelvises, the obturator foramina are round in the male and oval in the female.
Additionally, unilateral pelvis hypoplasia can cause differences in size between the obturator foramina, and there are even rare reports of individual pelvises featuring a double obturator foramen in one of the hip bones.
- Apostolos Karantanas, Konstantina Velesiotou, and Evagelos Sakellariou (2002). "Double Obturator Foramen". Larissa General Hospital, Greece.
- Anatomy photo:17:st-0205 at the SUNY Downstate Medical Center - "Major Joints of the Lower Extremity: hip and sacrum (anterior view)"
- Atlas image: male_urethrogram at the University of Michigan Health System - "Pelvis & Perineum: Male Urethrogram"
- Photo at vc.cc.tx.us