This paper deals with studies of the effect of stimulation of gastric mechanoreceptors on components of the complex conditioned motor food reflex. It was demonstrated that not all components of this reaction were disturbed by stimulation of gastric mechanoreceptors, but only those associated with the act of food ingestion. This indicates that the influence of the mechanoreceptors is not diffuse, but specialized. It was shown experimentally that higher nervous activity was not appreciably changed in the rats investigated, whereas the act of ingestion itself was inhibited in all these animals.