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Laboratory 43. The Female Pelvis
Step 16. Muscles of the Pelvic Diaphragm

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The levator ani muscle provides stability and elasticity to the pelvic floor and provides clinically important support to the pelvic organs, mainly the uterus. The levator ani muscle is composed of three parts:

  • puborectalis muscle, which attaches to the pubic rami and encircles the rectum. This muscle provides support to the urinary bladder, and maintains the anorectal angle
  • pubococcygeus muscle, which attaches to the pubic rami and the coccyx
  • iliococcygeus muscle, which originates from the tendinous arch of the obturator internus fascia.

Links and References:
Grant's: 3.41
Netter (1ed.): 377, 337, 338 (2ed.): 373, 333, 334
Rohen/Yokochi: 323