The motivational dominant in goal-directed behavior.

Results of experimental studies on discontinuation of the motivational dominants thirst and hunger and the "polarization" motor dominant, taken together with a theoretical analysis of the development of types I and II conditioned reflexes, lead to the conclusion that discontinuation of the motivational dominant plays a key role in organization goal-directed behavior. The activation of reciprocal connections between the appropriate centers provides a basis for the performance of goal-directed behavior.