Relationship between the spike activities of the small and large intestines.

Journal de physiologie Pub Date : 1991-01-01
E Atanassova, A Noeva, S Gachilova
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Abstract

Experiments were performed using chronically implanted electrodes on the dog smooth muscle wall of the stomach and of the small and large intestines. Electrical activity of the muscle wall was recorded before and after feeding. When reaching the terminal ileum the active part of the migrating myoelectrical complex (MMC) continuously induced bursts of spike potentials superimposed on the slow waves. This electrical activity spread to the ascending colon. We also showed the existence of a spike activity on the terminal ileum independent of the MMC (appearing during the phase 1) and propagating to the colon. A relationship between the spike activities of the small and large intestines was also present after feeding. Beside the well-known gastro-colic reflex, we observed an increase in the spike activity of the terminal ileum and ascending colon between the 4th-5th hours after feeding. This probably corresponds to the arrival of the first portions of contents, evacuated from the arrival of the first portions of contents, evacuated from the stomach, and of the last portions of small intestinal contents. In conclusion, there is a relationship between the spike activities of the small and large intestines in starving animals and after feeding, and the terminal ileum plays a substantial role in this relationship.

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小肠和大肠尖峰活动的关系。
实验采用长期植入电极在狗的胃平滑肌壁和小肠和大肠进行。进食前后记录肌壁电活动。当到达回肠末端时,迁移肌电复合体(MMC)的活跃部分不断地诱发叠加在慢波上的尖峰电位爆发。这种电活动扩散到升结肠。我们还发现在回肠末端存在一个独立于MMC的尖峰活动(出现在第一阶段),并传播到结肠。喂食后小肠和大肠的尖峰活动之间也存在关系。除了众所周知的胃绞痛反射外,我们还观察到回肠末端和升结肠在进食后4 -5小时之间的尖峰活动增加。这可能对应于第一部分内容物的到达,从第一部分内容物的到达中排出,从胃中排出,以及小肠内容物的最后一部分。综上所述,饥饿动物小肠和大肠的尖峰活动与摄食后存在一定的关系,而回肠末端在这一关系中起着重要作用。
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