A case study on the relationship between neuro-sensory work and work load

A series of experiments were carried out to obtain data on the psycho-physiological reactions of train conductors/operators while at work. From the results, it can be said that: (1) There exists a strong and positive correlation between heart rate variations and those of CFF, (2) heart rate and CFF variations at work became lower as working hours increased, (3) the driver's deterioration of the level of psycho-physiological reactions' drivers showed on going is higher than that of returning, (4) Driving at midnight or in the early morning seems to cause a significantly larger reduction of brain related arousal level.