Research Article| Volume 15, ISSUE 2, P132-141, November 1929

Studies in the alimentary tract of man

IV. The reflex effect of heat and cold upon gastric responses
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      • 1.
        1. In trained stabilized stomachs the effects of heat and of co.ld on the gastric reaction pattern can be demonstrated by the exhibition of a regular milk meal heated to 140 °F. or cooled to 3Z °F. They can be even better demonstrated by giving a regular milk meal at 70 °F. after applying a hot water bag or an ice pack to the abdominal wall during forty-five minutes preceding the feeding.
      • 2.
        2. Inasmuch as the effect of the stimulus is more pronounced when applied indirectly through the abdominal wall than when directly applied to the gastric mucosa we conclude that the response is redex in character.
      • 3.
        3. Heat induces an intensely active stomach of small dimensions which is quite different in pattern from the active stomach induced by buttermilk. It enters the neutral phase after twenty minutes.
      • 4.
        4. The application of external heat has no specific effect on the Magenblase but a hot drink brings about a broadening of the Magenblase.
      • 5.
        5. Cold, whether applied directly or through the abdaminal wall, has little or no effect upon total area of shadow. It induces a long narrow stomach outline with a Magenblase distended vertically, accompanied by rise of the left cupola. The stomaoh is quite active for five minutes and then becomes progressively lethargic. Twenty minutes after ingestion of the meal the stomach enters its neutral phase.
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