[Rat brain catecholamines in the initial period of acute radiation exposure].

Total X-ray irradiation (0.21 C/kg of rats induces an hour later an increase in the dopamine and norepinephrine content in the grey matter by 11 and 60%, respectively. The spontaneous release of dopamine and norepinephrine from the brain synaptosomes of the irradiated rats falls causing a decrease of the initial rate of the process.