The urogenital diaphragm is an archaic term describing a layer of the pelvis separating deep perineal sac from the upper pelvis. Unfortunately, the term is still in common use despite the fact that such a discrete border of the sac probably does not exist.
Nevertheless, the urogenital diaphram usually includes:
sphincter urethrae (external urethral) muscle
deep transverse perineal muscle
superficial transverse perineal muscle
perineal membrane
The urogenital diaphragm is often confused with the pelvic floor, which is a true diaphragm supporting many of the pelvic organs. The pelvic floor or pelvic diaphragm is composed largely of muscle fibers of levator ani and connective tissue. ...
}} The urogenitaldiaphragm is the traditional (but invalid) anatomical term for a layer of the pelvis that separates the deep perineal sac from the upper pelvis, lying between the inferior fascia of the urogenitaldiaphragm and superior fascia of the urogenitaldiaphragm.
While this term is used to refer to a layer of the pelvis that separates the deep perineal sac from the upper pelvis, such a discrete border of the sac probably does not exist.
The urogenitaldiaphragm is often confused with the pelvic floor, which is a true diaphragm supporting many of the pelvic organs.