[Effect of feeding on the activity of duodenal smooth muscle in dogs].
The electric activity of the duodenum smooth muscles was investigated with chronically implanted electrodes. This activity after feeding was compared with that in fasting during the time equal to the period of rest and the active period of the duodenum in fasting. The number of pacesetter potentials was identical during digestion and fasting. The number of spike potentials was significantly different during these compared states. The relationship of the "digestive" and "hungry" electrical activities of the duodenum depended both on the compared type of potential and on the compared time periods. Apparently the optimum of the "digestive" function of the duodenum smooth muscles consists in the fact that this activity fluctuates within a definite range--between the maximum level (during the active period) and the minimum one (during the period of rest, i.e. fasting).
D000200:Action Potentials; D000818:Animals; D004063:Digestion; D004285:Dogs; D004386:Duodenum / Q000502:physiology*; D005215:Fasting; D005769:Gastrointestinal Motility; D009130:Muscle, Smooth / Q000502:physiology*; D010507:Periodicity
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