[Visceral afferentation and nociception].

The authors present the results of acute cat experiments in which characteristics of the heart afferent reactions were studied by registration of evoked potentials. It was shown that in occlusion of the coronary arteries afferent and vegetative reactions did not correlate with development of cardial nociception. This was related to opiate mechanisms of the intraorgan regulation. In myocardial histotoxic hypoxia intraorgan mechanisms of the heart afferent reactions were destroyed.