ABSTRACT
According to P. S. Kupalov, there are two kinds of brain processes involved in conditioning. One process is related to the intermittent conditioned stimulus that produces the conditioned reaction. When conditioning was well established, electrical stimulation of the right homotypical cortical regions including the right ectosylvian area was applied. A specific case of situational influence on conditioned reflexes was observed by R. W. Doty and C. E. Giurgea. The influence of the experimental situation in conditioning was earlier demonstrated in studies conducted in J. Konorski's laboratory. In the presence of food the conditioned stimulus evoked a negative reaction, i.e., cessation of eating and turning away from the feeder; and in the absence of food, the same stimulus produced a positive feeding reaction. The tests for conditioning showed that rats in the morphine groups, compared to the saline group, showed an anticipatory hypothermia in the pre-injection environment; this was just opposite of the unconditioned hyperthermia to morphine.
