File:Cloacal morphology in its relation to genito-urinary and rectal diseases. (With 54 plates and 93 illustrations.) (1916) (14777698891).jpg

Identifier: cloacalmorpholog00rick (find matches)
Title: Cloacal morphology in its relation to genito-urinary and rectal diseases. (With 54 plates and 93 illustrations.)
Year: 1916 (1910s)
Authors: Ricketts, B. Merrill (Benjamin Merrill), b. 1858
Subjects: Genitourinary organs Rectum
Publisher: Cincinnati (The author)
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons

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Fig. 19.—Muscles in floor of pelvis—superior view (Deaver). Fig. 20.—Triangular ligament and compressor urethras muscle (Deaver). Page Nineteen It is separated from the pelvic contents above by the peritoneum and below^ by the baseof the ischio-rectal fossa and is crossed by the internal pudic vessels and nerve in theouter wall of the fossa in a special sheath of fascia. Piriformis muscle arises within the pelvis between the first, second, third and*^fourthsacral vertebrae, and from the adjacent part of the bone external to the anterior sacralforamen. Passing out through the great sacro sciatic foramen it receives an origin fromthe upper margin of the great sciatic notch of the ilium and from the pelvic surface of thegreat sacro sciatic ligament, forming in the buttocks a round tendon which is inserted intoa facet on the upper border and inner aspect of the great trochanter of the femur partlysurrounding the insertion of the obturator internus. It lines the posterior wall of the

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