title: Fatigue in industry.
abstract: Physical fatigue is a painful phenomenon which is localised in overstressed muscles. Mental fatigue is a diffuse sensation of weariness; it is a functional state, one of several intermediate conditions between the two extremes of alarm and sleep. A neurophysiological model of fatigue, involving an activating and inhibitory system has been developed. Fatigue in industrial practice has clinical symptoms: psychic instability, fits of depression and increased liability to illness. Indicators of fatigue are work of performance, subjective feelings of fatigue, electroencephalography, flicker-fusion frequency and various psychomotor and mental tests. Several field studies do, to some extent, confirm the above-mentioned concept of fatigue.
mesh_terms: D001334:Automobile Driving; D001887:Boredom; D005221:Fatigue / Q000209:etiology / Q000378:metabolism / Q000503:physiopathology*; D006801:Humans; D005222:Mental Fatigue / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology*; D008954:Models, Biological; D009119:Muscle Contraction; D009132:Muscles / Q000378:metabolism / Q000503:physiopathology; D009420:Nervous System / Q000503:physiopathology*; D009784:Occupational Diseases / Q000209:etiology / Q000503:physiopathology*