The pelvic floor or pelvic diaphragm is composed of muscle fibers of the levator ani, the coccygeus, and associated connective tissue which span the area underneath the pelvis. The pelvic floor separates the pelvic cavity above from the perineal region below. The pelvic cavity of the true pelvis has the pelvic floor as its inferior border. The perineum has the pelvic floor as its superior border. Inferiorly, the pelvic floor extends into the anal triangle.
Function of Pelvic Floor Muscles: It is a very broad base of muscles and these muscles have to perform complex tasks. For example, these muscles need to contract when you walk around without urinating. They have to relax during sexual intercourse. They also need to relax during a bowel movement. Even more importantly, one part of the muscle may be contracting while the other is relaxing.
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