MANOMETRIC AND ELECTROMYOGRAPHIC STUDIES ON THE EFFECT OF TRANSECTION OF CANINE STOMACH ON THE PYLORIC MOTOR FUNCTION

To elucidate motor function of the stomach manometric as well as electromyographic study of the pylorus of the canine stomach was carried out following transections and end-to-end anastomoses at various levels such as proximal 1/3, and 1/2, distal 1/3 and 1/4, and 4, 3, 2, and 1 cm from the pyloric ring.The hyperfunction of the pylorus with higher contraction pressure, prolonged discharge interval and more frequent anti-peristalsis appeared following transections between the levels of 1/2 of the organ and 4 cm from the pyloric ring. The most remarkable hyperfunction was noted following the distal 1/3 transection.Following transections within 2 cm from the pyloric ring, hyperfunction of the pyloric ring was still present on electromyogram but the contraction pressure became below the control value.