File:American journal of physiology (1898) (14782758422).jpg

Identifier: americanjourna33ameruoft (find matches)
Title: American journal of physiology
Year: 1898 (1890s)
Authors: American Physiological Society (1887- ) American Physiological Society (1887- ). Abstracts of papers presented at the fall meeting American Physiological Society (1887- ). Proceedings
Subjects: Physiology Physiology
Publisher: (Bethesda, Md., etc.) American Physiological Society (etc.)
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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normal or greater than normal hunger contractions throughoutthe starvation period. Since the increase in the hunger contrac-tions appeared to be just as marked in the dogs with the stom-ach isolated from the central nervous system as in normal dogs,it follows that the cause of this increase is not an augmentationof the vagus tonus. I propose to determine whether the in-crease is due to changes in the blood or to the starvation meta-boKsm of the stomach tissue itself by transfusion experiments.These starvation periods were not of sufficient length tocause very marked asthenia either in the men or in the dogs.The present data do not, therefore, answer the question to what 114 A. J. Carlson extent the motor mechanism of the empty stomach shares inthe general asthenia produced by more protracted fasting.They do show that the hunger contractions persist with normalor greater than normal vigor during shorter starvation periods.These positive results show, further, that the exceptional cases
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Figure 5. (Four-ninths the original size.) A, tracing showing end of hunger periodof Dog V after six days of starv^ation. The vagi and splanchnic nerves sectionedbefore the starvation period. B, typical hunger contractions of Dog VH afterseven days starvation. Section of both vagi before the starvation period. Show-ing persistence and increase of hunger contractions of the stomach isolated fromthe central nervous system in prolonged starvation. of gastric hypotonus and decreased gastric motihty are not dueto starvation as such, but to special and exceptional factors.The depression may be due (i) to a primary asthenia of thestomach; (2) central inhibition via the splanchnic nerves (pains,depression, etc.); (3) acid inhibition from the stomach mucosaowing to copious secretion of gastric juice. This questionrequires further investigation. IV. Discussion or the Results So far as we are aware, this is the first time that actualrecords have been taken of the gastric hunger contractions inma

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