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Recordings of pressure changes and electrical activity from the proximal small intestine of seven to eight-week-old unanesthetized chickens were made with chronically implanted transducers. The recordings were used to quantitate and determine the relationships among basic electric rhythm (BER), spike potentials (SP), and intestinal contractions (IC) of the duodenum. The omnipresence of the BER was demonstrated. SP were recorded whenever IC were detected. SP numbers and amplitudes were directly related to the strength of IC. Acetylcholine caused a general increase in the number and amplitude of both SP and IC. Epinephrine completely abolished both SP and IC. The results suggest that BER may represent the stimulus that initiates SP, and therefore, IC of the duodenum.
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Life Sciences and Agriculture Experiment Station
Poultry or Avian Science
MBA-Mezoui, C., F.H. Bird, and C.B. Chawan. 1979. Motor and electric activity of the duodenum of broilers. Life Sciences and Agriculture Experiment Station Technical Bulletin 89.