The pelvic brim is the edge of the pelvic inlet. It is an approximately apple-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 somewhat apple-shaped, 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 (see also Abdomen). In this case, the pelvic cavity coincides with the true pelvis, which is below the above-mentioned plane.
... The pelvic inlet or superior aperture of the pelvis is a planar surface which defines the boundary between the pelvic cavity and the abdominal cavity (or, according to some authors, between two parts of the ... relative to the skeleton of the pelvis is anatomically defined by its edge, the pelvic brim ... The pelvic brim is an approximately apple-shaped line passing through the prominence of the sacrum, the arcuate and pectineal lines, and the upper margin of the pubic symphysis ...
... In human anatomy, the pelvis (plural pelves or pelvises, sometimes also called pelvic region of the trunk) is the lower part of the trunk, between the abdomen and the lower limbs (legs) ... The pelvis includes several structures the bony pelvis, or pelvic skeleton, the part of the skeleton connecting the sacrum region of the spine to the femurs, subdivided into ... In an adult human being, the pelvic skeleton is thus composed of three large bones, and the coccyx (3–5 bones) however, before puberty, each hip bone consists of three ...
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“If your letters are as long as the bible, they will appear short to me. Only let them be brim full of affection.”
—Thomas Jefferson (17431826)