STUDIES ON EVALUATION OF MENTAL FATIGUE

抄録

Mental fatigue due to a measuring task in conveyor and non-conveyor systems, exposure to continuous, regular and intermittent white noises, muscular load by a bicycle ergometer, and a continuous maintenance of concentration by the TAF-test was analysed from the viewpoint of higher nervous activity in the human brain. The function of maintaining concentration (TAF), electroencephalogram (EEG), and averaged auditory evoked response (AER) were administered for evaluating the fatigue.
The results showed that the reduction of TAF, changes in brain wave appear-ance ratio, reduction or prolongation of peak latency, and decrease and increace in peak-to-peak amplitudes in AER were available for the evaluation of mental fatigue.