Electrophysiological studies on the intestinal intrinsic reflex.

HUKUHARA, YAMAGAMI and NAKAYAMA7) have reported that the intestinal reflex consists of two kinds, the mucosal and muscular reflexes, distinctly different in nature from each other. In the former the mechanical or the chemical stimulation of the mucosa produces excitation above and inhibition below the stimulated spot, and in the latter the mechanical or the chemical stimulation of the muscular coats produces inhibition both above and below the stimulated spot. Furthermore, HUKUHARA, NAKAYAMA and NANBA8 have proposed a view that the majority of the receptors of the muscular intrinsic reflex is located in the longitudinal muscular coat. In the present study, in order to corroborate the validity of the conclusion above mentioned, the effects of stimulating the mucosa or the muscle on the motility of the small intestine close to the stimulated spot have been electrically investigated.