[Systemic and cerebral hemodynamics and mental activity in marked neuro-emotional stress]

Changes in efficiency of mental activity and general and brain hemodynamics in students of physico-mathematical faculty when they solve problems on math analysis for 3 hours under conditions of pronounced neuro-emotional tension (NET) during examination have been experimentally studied. The results obtained from these studies are considered. It is shown that relation of higher nervous activity and general and brain hemodynamics is determined by efficiency of the activity, its energy provision (intensity), the level of NET and the rate of automated psychic reactions. A conclusion is made that efficiency of the activity is a basic system-forming factor in a relation arising between higher nervous activity, on the one hand, and general and brain hemodynamics, on the other hand. The higher is the efficiency, the lower are power requirements and the level of NET and the higher is the rate of automated psychic reactions: mental working capacity.