WebLecture-Pelvis-Lec30

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I. Orientation of Pelvis

II. Osteology

III. Joints

IV. Ligaments

V. Pelvic Musculature

VI. Perineum

WebLecture Slide 30

The most posterior of these pelvic effluents is the rectum. The rectum is surrounded by bands of muscle called the puborectalis muscle. The paired puborectalis muscles originate from the pubis, just lateral to the symphysis and head posteriorly towards the rectum. Fibers of the left and right puborectalis muscles pass posterior to the rectum and join muscle fibers of the contralateral side. The puborectalis joins the external anal sphincter and forms a sling around the rectum producing a flexure at the anal rectal junction.

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