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Biomedical subjects

S M Rashman

Publications and source records attributed to S M Rashman.

10 recordsLinked to original sources
PubMedDate not supplied

[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.

Adolescent↗
PubMedDate not supplied

[Hemodynamics (general and cerebral) and mental activity under normal conditions].

Interrelations between the mental work efficiency and changes in total and cerebral hemodynamics during mental activity are considered. Five subgroups of the efficiency are distinguished. Changes in the vegetative reactions considerably differ in the type as well. Basic four types of such reactions are distinguished with allowance for changes in the character of minute blood circulation volume and cerebral blood flow. Comparison of changes in the efficiency of the activity with vegetative changes shows that in the process of the mental activity the vegetative changes are determined by interrelation between the intensity of the mental activity and its efficiency. It was concluded that the higher the activity efficiency, the lower the mental intensity and changes in the total and cerebral hemodynamics and, vice versa.

Adolescent↗