J.Jpn. Surg. Soc.. 58(10): 1590-1602, 1958
AN ELECTROPHYSIOLOGICAL STUDY ON THE MOVEMENTS OF THE ESOPHAGUS WITH EXPERIMENTAL STRICTURE
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First Department of Surgery, Tokushima University School of Medicine (Directors: Profs. Takita and Oka) Hirokimi TANIHARA |
The movements of the tubular segments of the esophagus filled with Tyrode's solution were observed and recorded by means of resistering the longitudinal shortening or change of intraluminal pressure. Simultaneously the action current of this esophageal segment was recorded using Ag-AgCl non-polarizable electrode of 50μ in diameter, R-C amplifier and Yokogawa's electro-oscillograph (H type vibrator).
In the upper section of the normal and chronically obstructed esophagus, neither movements were found nor spike potential was recorded. In preparations from the middle portion, however, very weak and irregular movements were seen. In segments prepared from the lower portion of the esophagus, vigorous rhythmic contractions were distinctly observed. In the latter two cases the so-called "local reflex movement" was demonstrated, and this movements consist of not only a mere peristalsis but also of the pendular movement and the segmentation. A group of spikes appears preceeding the onset of contraction corresonding peristaltic rhythm. The spike potentials which appear in the " local reflex movement" is essentially the same, in nature, with those appearing in normal movement. The movements of hypertrophic segments of the esophagus with chronic obstruction were vigorous and tend to appear in groups. The "local reflex movement" seems much stronger than those of normal movement.
The amplitude of spike potentials recorded from the hypertrophic esophagus was greater as compared with those of nermal segment. The spike potentials appearing in the "local reflex movement" was also greater than those of normal movement.
(author's abstract)
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