WebLecture-Pelvis-Lec29

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I. Orientation of Pelvis

II. Osteology

III. Joints

IV. Ligaments

V. Pelvic Musculature

VI. Perineum

WebLecture Slide 29

This puborectalis muscle is barely distinct from the pubococcygeus at their origin on the posterior side of the pubic bodies. However, the pubococcygeus passes posteriorly in a plane superior to that traversed by the pubrectalis and inserts on the anterior surface of the coccyx. Although not shown in this drawing, certain fibers of the pubococcygeus muscle are directed towards the midline and blend with specialized sphincter muscles or the walls of other organs before they reach the coccyx. These portions of the pubococcygeus muscle are assigned names that specify their insertion and include insertions into the sphincter urethrae (and in the male into the prostate), into the vagina in females, and into the perineal body (see below) and rectum in both males and females. The majority of muscle fibers pass posteriorly towards the coccyx.

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