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What is pelvic brim?

Published in Anatomy 1 min read

The pelvic brim is the bony crest that defines the limit of the pelvic inlet. It is the border between the false pelvis (above) and the true pelvis (below).

Detailed Explanation

Here's a more detailed breakdown of the pelvic brim, using information from the provided reference:

  • Definition: The pelvic brim is the bony crest that delineates the pelvic inlet, marking the boundary between the greater (false) and lesser (true) pelvis.
  • Components: According to the reference, the pelvic brim includes the following bony landmarks:
    • Promontory of the sacrum: This is the superior portion of the sacrum that projects forward.
    • Linea terminalis: This ridge continues inferolaterally from the sacral promontory along the ilium. It represents the rounded edge separating the sacral bases from the anterior face of the sacrum.

In summary, the pelvic brim is a continuous oval ridge of bone that forms the upper boundary of the true pelvis.