Appearance of the Levator Ani Muscle Subdivisions in Endovaginal Three-Dimensional Ultrasonography Shobeiri SA et al. - The location of the pubovaginalis, puboperinealis, puboanalis, puborectalis, and iliococcygeus as seen by three-dimensional endovaginal ultrasonography was confirmed through anatomic dissection of fresh-frozen pelves. Subdivisions of the levator ani muscle were visualized reliably with three-dimensional ultrasonography using a systematic approach. [more...]