Pelvic brim
 | This article includes a improve this article by introducing more precise citations. (April 2009) ) |
| Pelvic brim | |
|---|---|
lesser pelvis -- female. (Pelvic brim is not labeled, but is identifiable as the central opening at the top.) | |
| Identifiers | |
| FMA | 224780 |
| Anatomical terms of bone] | |
The pelvic brim is the edge of the
arcuate and pectineal lines, and the upper margin of the pubic symphysis
.
Structure
The pelvic brim is an approximately
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
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
This article incorporates text in the public domain from page 238 of the 20th edition of Gray's Anatomy (1918)
- ISBN 978-1-4160-9979-6, retrieved 2021-01-30
- ISBN 978-0-443-10373-5, retrieved 2021-01-30
- ISBN 978-0-12-802653-3, retrieved 2021-01-30
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