{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,31]],"date-time":"2026-03-31T06:58:11Z","timestamp":1774940291544,"version":"3.50.1"},"reference-count":13,"publisher":"The Company of Biologists","issue":"21","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2006,11,1]]},"abstract":"<jats:title>SUMMARY<\/jats:title>\n               <jats:p>The importance of the diaphragmaticus muscle to vital capacity was investigated in juvenile American alligators by transection of this muscle. In both fasting and post-prandial animals a pneumotach was used to study vital capacity that was stimulated by either a hypercapnic-anoxic gas mixture or a hypercapnic-normoxic gas mixture in two types of control groups of animals (a shamoperated group and a group receiving no treatment) and in the experimental(transected) group. Transection did not significantly reduce vital capacity or affect time of inspiration or expiration in fasted animals. For both the experimental and control groups vital capacity was greatly reduced in post-prandial animals compared to the fasting state. Furthermore, alligators with a transected diaphragmaticus muscle showed a 16-18% greater drop in vital capacity in the post-prandial state than did alligators with an intact diaphragmaticus muscle. The post-prandial decrease in vital capacity for alligators with a transected diaphragmaticus occurred concomitantly with a significant increase in time to inspire and a decrease in maximum rate of inspiration when compared to control animals. The results from this study suggest that the diaphragmaticus muscle plays an important role in enabling large volumes of oxygen to be taken into the lungs in the post-prandial state.<\/jats:p>","DOI":"10.1242\/jeb.02523","type":"journal-article","created":{"date-parts":[[2006,10,18]],"date-time":"2006-10-18T21:08:18Z","timestamp":1161205698000},"page":"4313-4318","source":"Crossref","is-referenced-by-count":15,"title":["Contribution of the diaphragmaticus muscle to vital capacity in fasting and post-prandial American alligators (<i>Alligator mississippiensis<\/i>)"],"prefix":"10.1242","volume":"209","author":[{"given":"T. J.","family":"Uriona","sequence":"first","affiliation":[{"name":"Department of Biology, 257 South 1400 East, University of Utah, Salt Lake City, UT 84112, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C. G.","family":"Farmer","sequence":"additional","affiliation":[{"name":"Department of Biology, 257 South 1400 East, University of Utah, Salt Lake City, UT 84112, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"237","reference":[{"key":"2021042510184996100_REF1","doi-asserted-by":"crossref","unstructured":"Boelert, R. (1942). Sur la physiologie de la respiration de l'Alligator mississippiensis.Arch. Int. Physiol.52,57-72.","DOI":"10.3109\/13813454209145577"},{"key":"2021042510184996100_REF2","doi-asserted-by":"crossref","unstructured":"Busk, M., Overgaard, J., Hicks, J. W., Bennett, A. F. and Wang,T. (2000). Effects of feeding on arterial blood gases in the American alligator Alligator mississippiensis.J. Exp. Biol.203,3117-3124.","DOI":"10.1242\/jeb.203.20.3117"},{"key":"2021042510184996100_REF3","doi-asserted-by":"crossref","unstructured":"Farmer, C. G. and Carrier, D. R. (2000). Pelvic aspiration in the American alligator (Alligator mississippiensis). J. Exp. Biol.203,1679-1687.","DOI":"10.1242\/jeb.203.11.1679"},{"key":"2021042510184996100_REF4","doi-asserted-by":"crossref","unstructured":"Gans, C. and Clark, B. (1976). Studies on ventilation of Caiman crocodilus (Crocodilia: Reptilia). Respir. Physiol.26,285-301.","DOI":"10.1016\/0034-5687(76)90001-3"},{"key":"2021042510184996100_REF5","doi-asserted-by":"crossref","unstructured":"Gaunt, A. S. and Gans, C. (1969). Mechanics of respiration in the snapping turtle, Chelydra serpentina (Linne\u0301). J. Morphol.128,195-228.","DOI":"10.1002\/jmor.1051280205"},{"key":"2021042510184996100_REF6","unstructured":"George, J. C. and Shah, R. V. (1959). The structural basis of the evolution of the respiratory mehanism in chelonia. J. Anim. Morphol. Physiol.1, 1-9."},{"key":"2021042510184996100_REF7","unstructured":"Hartzler, L. K., Munns, S. L. and Hicks, J. W.(2004). Contribution of the hepatic piston to ventilation in the American alligator, Alligator mississippiensis.FASEB J.18,A238.4."},{"key":"2021042510184996100_REF8","unstructured":"Keith, A. (1905). The nature of the mammalian diaphragm and pleural cavities. J. Anat. Physiol.39,243-248."},{"key":"2021042510184996100_REF9","doi-asserted-by":"crossref","unstructured":"Pickering, M. and Jones, J. F. X. (2002). The diaphragm: two physiological muscles in one. J. Anat.201,305-312.","DOI":"10.1046\/j.1469-7580.2002.00095.x"},{"key":"2021042510184996100_REF10","doi-asserted-by":"crossref","unstructured":"Pickering, M., Campion, D. and Jones, J. F. X.(2004). A gastrointestinal role for the amphibian `diaphragm' of Xenopus laevis.J. Zool.264, 45-51.","DOI":"10.1017\/S0952836904005497"},{"key":"2021042510184996100_REF11","unstructured":"Reese, A. M. (1915). The Alligator and Its Allies. New York: G. P. Putnam's Sons."},{"key":"2021042510184996100_REF12","doi-asserted-by":"crossref","unstructured":"Snapper, J. R., Tenney, S. M. and McCann, F. V.(1974). Observations on the amphibian \u201cdiaphragm\u201d. Comp. Biochem. Physiol.49A,223-230.","DOI":"10.1016\/0300-9629(74)90111-X"},{"key":"2021042510184996100_REF13","doi-asserted-by":"crossref","unstructured":"Woodward, A. R., Hines, T. C., Aberrombie, L. and Nichols, J. D. (1987). Survival of young American alligators on a Florida lake. J. Wildl. 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