Abstract
The movements of the villi were studied in anesthetized dogs. The results are summarized as follows:
1. The villi shorten quickly at irregular intervals and then extend slowly, each villus contracting about 10-28times per minute quite independently of its neighbours.
2. The activity of the villi is greater in the upper part than in the lower part of the small intestine.
3. Stimulation of the cervical vagus nerve caused a slight increase in the activity of the villus, while stimulation of the splanchnic nerve and mesenteric nerve inhibited its activity.
