Obturator foramen

Obturator foramen
Bone: Obturator foramen
Skeletpelvis-pubis.jpg
Pelvis. Obturator foramen is 7.
Gray321.png
Symphysis pubis exposed by a coronal section. Obturator canal labelled at center.
Latin foramen obturatum
Gray's subject #57 237

The obturator foramen is the hole created by the ischium and pubis bones of the pelvis through which nerves and muscles pass.

Contents

General structure

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:

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

---> For etymology see obturate.

Variations

Reflecting the overall gender 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]

See also

Additional images

References

  • This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.
  1. ^ Apostolos Karantanas, Konstantina Velesiotou, and Evagelos Sakellariou (2002). "Double Obturator Foramen". Larissa General Hospital, Greece. http://www.ajronline.org/cgi/content/full/178/1/245. 

External links




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Look at other dictionaries:

  • Obturator foramen — Obturator Ob tu*ra tor, a. (Anat.) Serving as an obturator; closing an opening; pertaining to, or in the region of, the obturator foramen; as, the obturator nerve. [1913 Webster] {Obturator foramen} (Anat.), an opening situated between the public …   The Collaborative International Dictionary of English

  • obturator foramen — n an opening that is the largest foramen in the human body, is situated between the ischium and pubis of the hip bone, and is closed by the obturator membrane except for the obturator canal * * * a large opening in the hip bone, below and… …   Medical dictionary

  • obturator foramen — noun : an opening that is situated between the pubic and ischial parts of the innominate bone and that is largely closed by the obturator membrane see obturator canal …   Useful english dictionary

  • obturator foramen — noun Anatomy a large opening in the hip bone between the pubis and the ischium …   English new terms dictionary

  • obturator foramen — a large opening in the hip bone, below and slightly in front of the acetabulum. See also: pelvis …   The new mediacal dictionary

  • Obturator internus muscle — The obturator internus and nearby muscles …   Wikipedia

  • Obturator externus muscle — The obturator externus and nearby hip muscles (posterior view) …   Wikipedia

  • Obturator membrane — The obturator membrane. Latin membrana obturatoria Gray s …   Wikipedia

  • Obturator canal — The relations of the femoral and abdominal inguinal rings, seen from within the abdomen. Right side. (Obturator canal not labeled, but visible at bottom center.) …   Wikipedia

  • Obturator — Ob tu*ra tor, a. (Anat.) Serving as an obturator; closing an opening; pertaining to, or in the region of, the obturator foramen; as, the obturator nerve. [1913 Webster] {Obturator foramen} (Anat.), an opening situated between the public and… …   The Collaborative International Dictionary of English

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