Abstract
Correlations between the intraluminal pressure of the oviduct isthmu s and the electrical activity of the longitudinal peritoneal muscle surrounding the oviduct were studied in vivo in the rabbit. The electrical activity of the longitudinal peritoneal muscle was measured by implanted teflon-coated wire electrodes and the intraluminal pressure was measured by balloon-tipped catheters. A correlation between the spikes of electrical activity recorded in the peritoneal muscle and bursts of increased liminal pressure was found. The results suggest that the spontaneous increases in intraluminal pressure is the result of contractions of the longitudinal peritoneal muscle rather than the result of oviductal contractions in themselves.
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