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The linea terminalis or innominate line consists of the pubic crest, pectineal line (pecten pubis), the arcuate line, the sacral ala, and the sacral promontory. [1]It is the pelvic brim, which is the edge of the pelvic inlet.
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]
Its position and orientation 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. Occasionally, the terms pelvic inlet and ...
The iliopectineal line is the border of the iliopubic eminence. [1] It can be defined as a compound structure of the arcuate line (from the ilium) and pectineal line (from the pubis). With the sacral promontory , it makes up the linea terminalis .
The pectineal line of the pubis (also pecten pubis) is a ridge on the superior ramus of the pubic bone.It forms part of the pelvic brim.. Lying across from the pectineal line are fibers of the pectineal ligament, and the proximal origin of the pectineus muscle.
Medial to the pubic tubercle is the pubic crest, which extends from this process to the medial end of the pubic bone.. It gives attachment to the conjoint tendon, the rectus abdominis, the abdominal external oblique muscle, and the pyramidalis muscle.
[1] The arcuate line marks the border between the body ( corpus ) and the wing ( ala ) of the ilium, and, running inferior, anterior, and medial from the auricular surface to the area corresponding to the acetabulum , it also indicates where weight is transferred from the sacroiliac joint to the hip joint .
The true pelvis is the region inferior to the pelvic brim that is almost entirely surrounded by bone. [4] The pelvic inlet is the opening delineated by the pelvic brim. The widest dimension of the pelvic inlet is from left to right, that is, along the frontal plane. [4] The pelvic outlet is the margin of the true pelvis. It is bounded ...