Summary
1. The effect of insulin hypoglycemia on sigmoid activity was studied in 8 normal subjects by the use of small balloons and open-ended catheters. On separate occasions, colonic activity was studied in 4 of these subjects following intravenous glucagon.
2. When compared to the preinsulin level of activity, the response to insulin was biphasic, consisting of a depression phase during the 30- to 60-min. period and an excitatory phase during the 150- to 180-min. period. When compared to control (no injection) and placebo (saline) experiments, only the depression phase was significant.
3. No difference was observed in the effect of glucagon-free insulin and commercial insulin on colonic activity.
4. A positive correlation was observed between blood sugar levels and colonic activity following intravenous insulin.
5. Following intravenous glucagon, the number of waves was increased during the 0- to 30-min. period when comparison was made to the pre-glucagon level and to the same time interval in the placebo and insulin studies.
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The authors wish to acknowledge the invaluable assistance of Drs. Thomas E. Machella and Frank P. Brooks in carrying out this investigation.
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Killenberg, P.G., Cornwell, G.G. Effect of insulin hypoglycemia on the human sigmoid colon. Digest Dis Sci 9, 221–228 (1964). https://doi.org/10.1007/BF02232586
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DOI: https://doi.org/10.1007/BF02232586