. Anatomy, descriptive and applied. Anatomy. Spalteholz.) Relations.—By its deep, upper, or pehic surface the Levator ani is in relation with the rectovesical fascia, which separates it from the bladder, prostate, rectum, and peritoneum. By- its superficial, lower, or perineal surface it forms the inner boundary of the ischiorectal fossa, and is covered by a thin layer of fascia, the anal fascia, given off from the obturator fascia. Its posterior border is free and separated from the Coccygeus mviscle by a cellular interspace. Its anterior border is separated from the muscle of the opposite si
. Anatomy, descriptive and applied. Anatomy. Spalteholz.) Relations.—By its deep, upper, or pehic surface the Levator ani is in relation with the rectovesical fascia, which separates it from the bladder, prostate, rectum, and peritoneum. By- its superficial, lower, or perineal surface it forms the inner boundary of the ischiorectal fossa, and is covered by a thin layer of fascia, the anal fascia, given off from the obturator fascia. Its posterior border is free and separated from the Coccygeus mviscle by a cellular interspace. Its anterior border is separated from the muscle of the opposite side by a triangular space, through which the uretlora, and in the female the vagina, pass from the pelvis. The Levator ani may be divided into iliococcygeal and pubococcygeal parts. (Fig. 343.) The Iliococcygeus arises from the ischial spine and from the posterior part of the pelvic fascia, and is attached to the coccyx and anococcygeal raph^; it is usually thin, and may fail entirely, or be largely replaced by fibrous tissue. An accessory slip at its posterior part is sometimes named the Iliosacralis. The Pubococcygeus arises from the back of the pubis and from the anterior part of the pelvic fascia, and " is directed backward almost horizontally along the side of the anal canal toward the coccyx and sacrum, to which it finds attachment. Between the termination of the vertebral column and the anus the two pubococcygeal muscles come together and form a thick, fibromuscular layer lying on the raphe formed by the iliococcygei " (Thompson), The greater part of this muscle is inserted into the coccyx and into the last one or two pieces of the sacrum. This insertion into the vertebral column is, however, not admitted by all observers. The fibres which form a sling for the rectum are named the Puborecialis or Sphincter Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
