. The diagnosis and treatment of diseases of women. S a c r u rn I Pyriiormis mJ Coccygeus m. iPubic bone Obturator fascialObturator canal Fig. 494. The Pelvic Sling, from above. The observer is supposed to be standing at the right side of thecadaver and looking into the pelvis. The pelvic contents have been removed in order to show the pelvic floor.{Desiver—Surgical Anatomy.) LACERATION OF THE PELVIC FLOOR 473 of the posterior part of the levator ani muscle is the coccygeus muscle. The actionof the levator muscles, in conjunction with the fascia above and below them, is tohold forward the low

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. The diagnosis and treatment of diseases of women. S a c r u rn I Pyriiormis mJ Coccygeus m. iPubic bone Obturator fascialObturator canal Fig. 494. The Pelvic Sling, from above. The observer is supposed to be standing at the right side of thecadaver and looking into the pelvis. The pelvic contents have been removed in order to show the pelvic floor.{Desiver—Surgical Anatomy.) LACERATION OF THE PELVIC FLOOR 473 of the posterior part of the levator ani muscle is the coccygeus muscle. The actionof the levator muscles, in conjunction with the fascia above and below them, is tohold forward the lower end of the rectum and vagina close to the symph3^sis pubis,and at the same time to form a sling which closes the pelvic outlet and supportsthe organs above (Figs. 491, 492, 493, 494). Waldeyer has given this the veryappropriate designation of diaphragm of the pelvis. When the muscles and fasciae are torn, the effect is two-fold: 1. The sling is lengthened and does not furnish the suppport it previously did. 2. The vaginal and rectal openings (the weak places in the pelvic floor) area

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