. Cunningham's Text-book of anatomy. Anatomy. 494 THE MUSCULAR SYSTEM. the origin of the anal canal, (3) the ano-coccygeal raphe behind the anus, and (4) into the sides of the lower coccygeal vertebrae. The levator ani muscle fills up and completes the pelvic floor on each side of the median plane. Enclosed in a sheath derived from the general pelvic fascia along the arcus tendineus, the muscle presents an upper concave surface in relation to the pelvic cavity, prostate gland (or vagina), and rectum, and an. The arcus tendineus of the pelvic fascia Pubic bone (cut) BULBO- CAVEBNOSUS Sacro-tube
. Cunningham's Text-book of anatomy. Anatomy. 494 THE MUSCULAR SYSTEM. the origin of the anal canal, (3) the ano-coccygeal raphe behind the anus, and (4) into the sides of the lower coccygeal vertebrae. The levator ani muscle fills up and completes the pelvic floor on each side of the median plane. Enclosed in a sheath derived from the general pelvic fascia along the arcus tendineus, the muscle presents an upper concave surface in relation to the pelvic cavity, prostate gland (or vagina), and rectum, and an. The arcus tendineus of the pelvic fascia Pubic bone (cut) BULBO- CAVEBNOSUS Sacro-tuberous ligament (cut) Spina ischia- dic a (cut) Ischio- "\ coccygeus Ilio- coccyge0s v£ COCCYGEUS. Sphincter ani exteenus Fig. M Transversus permei superneialis Superior fascia of the urogenital diaphragm Sphincter urethr/E membranace^e Inferior fascia of the urogenital diaphragm -The Fascial and Muscular Wall of the Pelvis after Removal of Part of the Left Hip Bone. inferior convex surface which appears in the perineum and forms the medial wall of the ischio-rectal fossa. The levator ani is divisible into four parts—puborectalis, pubococcygeus, ilio- coccygeus, and iliosacralis. The puborectalis (levator prostata) is the part inserted into the central point of the perineum. The pubococcygeus is the part inserted into the anus and the ano-coccygeal raphe, and the iliococcygeus and ischiococcygeus are represented by the fibres attached to the sacrum and coccyx. The first two are best developed ; the last two series of fibres are the most rudimentary. These several parts of the muscle represent the remains of the flexor caudse of tailed animals. Nerve-Supply.—The levator ani is supplied from two sources : by the perineal (muscular) branch of the pudendal nerve, and, on its pelvic surface, by special branches from the third and fourth sacral Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability -
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
