ELECTROMYOGRAPHIC STUDY ON THE AUTOMATISM OF THE STOMACH

概要

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Canine stomach were transected consecutively starting at upper one-third, midline, lower one-third and lower one-fourth of the stomach and the changes in peristalsis in the lower segment of the stomach was studied electromyographically. In another experiment, stomachs were pre pared to consists of four segments by transecting and anastomosing at vari ous levels and electromyogram was taken from upper and lower middle seg ments of the stomach. The results are summarized as follows: 1) The lower the transection line was made, the longer was the discharge interval between each peristalsis in the segment distal to the anastomosis. 2) Antiperistalsis was elicited oftener in the lower segment when the transection was made below the midline. 3) Discharge intervals recorded from the lower middle segment of the stomach were generally longer than the ones recorded from the upper middle segment. 4) Antiperistalsis was also observed in the upper and lower segments of the stomach and the frequency of antiperisalsis was found higher in the upper middle segment. The frequency of antiperistalsis was much higher in case the middle two segments were made closer to the pylorus. 5) Out of the results mentioned above, it is estimated that each portion of the stomach has its own rhythm of peristaltic frequency and more tendency of antiperistaltic discharges was noted in the portion close to the pylorus.
日本平滑筋学会の論文