STUDIES ON THE FUNCTIONS AND FIBER CONNECTIONS OF THE AMYGDALOID NUCLEI AND PERIAMYGDALOID CORTEX. EXPERIMENTS ON GASTROINTESTINAL MOTILITY AND BODY TEMPERATURE IN CAT

Abstract

Summary Through electrical or chemical stimulation of a limited part of the amygdaloid complex unilaterally, elevation of temperature of the animal body and inhibition of the gastrointestinal motility can be recognized. By histological investigation of experimented cases it was revealed that to the former effect the lateral amygdaloid nucleus of amygdala proper (M of Völsch ) and to the latter the medial amygdaloid nucleus (T of Völsch ) were precisely responsible. The peiiamygdaloid cortex stands definitely unparticipated in these phenomenon. Further it was conceivable that the impulse from the amygdala reaches to the visceroeffective center of the hypothalamus apparently without interruption of its neuronal connection to work inhibitory upon the gastrointestinal motility. These results certainly speak for our assumption that the amygdaloid complex comprises a link of the autonomic representation for regulation of visceral functions.