LOCALITY OF RECEPTORS CONCERNED WITH THE INTESTINO-INTESTINAL EXTRINSIC AND INTESTINAL MUSCULAR INTRINSIC REFLEXES

抄録

1) With the small intestine in the dogs anesthetized with morphine and urethane the authors studied the localization of receptors which are concerned with the intestino-intestinal extrinsic and muscular intrinsic reflexes.
2) Both reflexes are elicited by stretching the longitudinal muscle layer of the small intestine and only this layer, but not by stretching other layers, i.e., the mucosa, submucosa and circular muscle layer not being causative of the reflexes.
3) It may be presumed that in the extrinsic reflex the longitudinal muscle layer contains the receptors whose cell bodies are located in the spinal ganglion, while in the muscular intrinsic reflex the receptors similar to the extrinsic one, are located in the longitudinal muscle layer but have in AUERBACH'S plexus their cell bodies which in turn are synaptically connected with the inhibitory neurons located in the plexus.