. The American journal of roentgenology, radium therapy and nuclear medicine . esses thanany part of the gastrointestinal tractexcepting the stomach and study is based upon dissections in46 cadavers. The terminal sigmoid con-tracture was found in 80 per cent of casesexamined. Mayo has shown that the recto-sigmoid apparatus is controlled by thepelvic plexus of nerves which is made upof a variable number of sympatheticganglia joined from above by spinal nervesfrom the lumbar region and from below bythe spinal nerves from the sacral region(Fig. 4)- 414 The Rectosigmoid Apparatus La
. The American journal of roentgenology, radium therapy and nuclear medicine . esses thanany part of the gastrointestinal tractexcepting the stomach and study is based upon dissections in46 cadavers. The terminal sigmoid con-tracture was found in 80 per cent of casesexamined. Mayo has shown that the recto-sigmoid apparatus is controlled by thepelvic plexus of nerves which is made upof a variable number of sympatheticganglia joined from above by spinal nervesfrom the lumbar region and from below bythe spinal nerves from the sacral region(Fig. 4)- 414 The Rectosigmoid Apparatus Langley3 and others have shown that dilated, produces a kink by overhanging nerves derived through the hypogastric the undilated portion below, thus producing plexus are inhibitory in character, while increased difficulty in defecation, progres- those from the spinal and sacral nerves sive accumulation of fecal matter and produce contracture of the muscle-fibers of progressive dilatation and hypertrophy the intestine upon stimulation. of the muscle-fibers of the colon, finalh. Fig. 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 obstructio
Size: 1432px × 1744px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1900, bookyear1906
