File:The American journal of roentgenology, radium therapy and nuclear medicine (1906) (14777187483).jpg

Identifier: americanjournroen09ameruoft (find matches)
Title: The American journal of roentgenology, radium therapy and nuclear medicine
Year: 1906 (1900s)
Authors: American Radium Society American Roentgen Ray Society
Subjects: Radiotherapy X-rays
Publisher: Springfield, Ill. C.C. Thomas
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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3. Normal colon in individual of hypersthenic habitus. Note that the pelvic colon is really wellabove the pelvis representing the characteristic posi-tion for this type. Keith1 has shown that the smoothmuscle-fibers in this region have the powerof originating contraction and that impulsesare collected in certain neuromuscularnodes and correlated. Mayo and Hurst both are of the opinionthat the failure of coordination in earlylife results in the so-called idiopathicdilatation of the colon, or Hirschsprungsdisease. This disease is, therefore, accordingto Mayo, similar in origin to cardiospasmat the cardiac orifice and ileocecal valvestasis. Hurst has suggested the name ofpelvirectal achalasia instead of Hirsch-sprungs disease (Fig. 5). According toHurst, the active relaxation of the circularmuscle-fibers at the pelvirectal juncturefails to occur, and a spasm is originated,which leads to partial obstruction withconsequent dilatation and hypertrophy ofthe pelvic colon. The colon, when once
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ns of MoYgHgTH Fig. 4. Terminal sigmoid, rectum and anal canal frominside. \Y. J. Mayo. Courtesj of Surgery, Gynecologyand Obstetrics. resulting in broken compensation with theloss of peristaltic power. PHYSIOLOGY Mayos anatomical studies have led himto the conclusion that the rectosigmoidapparatus is a definite mechanism, whichretards the fecal current and preventscontinuous progress of the intestinal con-tents into the rectum. Hurst, who ex- The Rectosigmoid Apparatus 45 amined a large number ofj young adults,comes to the same conclusion; he furtherstates that normally the rectum does notcontain fecal matter, except during theact of defecation. At other times the fecalcolumn is prevented from entering therectum by the tonicity of the rectosigmoidapparatus. The studies of Hurst,3 Holzknecht,6Barclay,7 Case/ and others disclose that Hurst has demonstrated that aboutthirty-three hours time is required for ameal to be entirely evacuated from thegastrointestinal tract. Food taken ninehou

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