Pelvic_brim

Pelvic brim

Pelvic brim

Add article description

The pelvic brim is the edge of the pelvic inlet. It is an approximately Mickey Mouse head-shaped line passing through the prominence of the sacrum, the arcuate and pectineal lines, and the upper margin of the pubic symphysis.

Quick Facts Identifiers, FMA ...

Structure

The pelvic brim is an approximately Mickey Mouse head-shaped line passing through the prominence of the sacrum, the arcuate and pectineal lines, and the upper margin of the pubic symphysis.

The pelvic brim is obtusely pointed in front, diverging on either side, and encroached upon behind by the projection forward of the promontory of the sacrum.

The oblique plane passing approximately through the pelvic brim divides the internal part of the pelvis (pelvic cavity) into the false or greater pelvis and the true or lesser pelvis. The false pelvis, which is above that plane, is sometimes considered to be a part of the abdominal cavity, rather than a part of the pelvic cavity. In this case, the pelvic cavity coincides with the true pelvis, which is below the above-mentioned plane.

The urinary bladder lies just above the anterior pelvic brim.[1] The sigmoid colon also passes close to the pelvic brim.[2]

Clinical significance

The pelvic brim may be a site of compression of structures that pass through the pelvic inlet. This can include the femoral nerves, which may occur during abdominal surgery.[3]

See also

Additional images

  • Pelvis

References

Public domain This article incorporates text in the public domain from page 238 of the 20th edition of Gray's Anatomy (1918)

  1. [1]
    Wilson, David A., ed. (2012-01-01), "Ultrasound: Urinary Tract", Clinical Veterinary Advisor, Saint Louis: W.B. Saunders, pp. 836–838, doi:10.1016/b978-1-4160-9979-6.00269-5, ISBN 978-1-4160-9979-6, retrieved 2021-01-30
  2. [2]
    Jacob, S. (2008-01-01), Jacob, S. (ed.), "Chapter 4 - Abdomen", Human Anatomy, Churchill Livingstone, pp. 71–123, doi:10.1016/b978-0-443-10373-5.50007-5, ISBN 978-0-443-10373-5, retrieved 2021-01-30
  3. [3]
    Lalkhen, Abdul Ghaaliq (2015-01-01), Tubbs, R. Shane; Rizk, Elias; Shoja, Mohammadali M.; Loukas, Marios (eds.), "Chapter 37 - Perioperative Peripheral Nerve Injuries Associated with Surgical Positioning", Nerves and Nerve Injuries, San Diego: Academic Press, pp. 587–602, ISBN 978-0-12-802653-3, retrieved 2021-01-30


Stub icon

This human musculoskeletal system article is a stub. You can help Wikipedia by expanding it.
Share this article:

This article uses material from the Wikipedia article Pelvic_brim, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.