[Conditioned-reflex food selection in mongrel white rats exposed to high temperature]

Under condition of normal temperature the conditioned reflectory runnings of rats on the audible irritants were developed more quickly during dry food than damp one. Daily influence of high temperature during two hours and partially water deprivation resulted in reduction of the conditioned reflex which had been developed before during dry food. The reproduction of the conditioned reflexes during dry food failed. The essential changings in the conditioned reflexes during damp and dry food were not found when animals had become overheating without restriction of water consumption. During daily heat affecting at the end of the second week animals adapted to high temperature. This statement is confirmed by lowering the rectal temperature, decrease of the breath rate, daily water consumption and restoration of the activity of conditioned reflexes.