Obturator foramen

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Obturator foramen
Skeletal pelvis-pubis.svg
Pelvis. Obturator foramen is 7.
Gray321.png
Symphysis pubis exposed by a coronal section. Obturator canal labelled at center.
Details
Latin foramen obturatum
Identifiers
Gray's p.237
Anatomical terms of bone

The obturator foramen (Latin foramen obturatum) is the hole created by the ischium and pubis bones of the pelvis through which nerves and blood vessels pass.

Structure[edit]

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:

Variation[edit]

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.[1]

Function[edit]

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

See also[edit]

Additional images[edit]

References[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.

  1. ^ Apostolos Karantanas, Konstantina Velesiotou, and Evagelos Sakellariou (2002). "Double Obturator Foramen". Larissa General Hospital, Greece. 

External links[edit]