“…The animals' activity is not simply organized by responses to the external stimuli, but also by expectation of situations based on the internal analysis of the model formed in the nervous system (Gallistel 1980). The model includes sequences of occurring events, which are used by the brain as an internal reference for control, for example, of eliciting fear (Hebb 1946), of orientation (Sokolov 1960), of attack and defense (Archer 1976), and of avoidance of predators (Csányi 1985a(Csányi , 1985b(Csányi , 1986(Csányi ,1988. In higher animals, the formation of an environmental model involves the internal representation of the animal itself to a great extent.…”