Subject(s)
Light , Photosensitivity Disorders/physiopathology , Adult , Humans , Male , Vision Disorders/physiopathologyABSTRACT
In order to determine the ways for prevention of operators' overstrain, the working conditions and functional body stress were dynamically studied during the 12-hour shift by means of TV video-recording. The majority of operators experienced some neurologic disorders, high rates of situational and personality anxiety and an elevated level of neurotism. Mean rate of potential systoles was 75 +/- 2 per min, systolic arterial pressure 114 +/- 2, diastolic AP 74 +/- 2 mm of mercury column. No renewable dynamics of the above indicators was noted. The Kerdau vegetative index experienced a decline from + 6.0 +/- 2.5 to -6.5 +/- 3.0 arbitrary units during the shift. The regulatory system strain index in the half of the examined workers reached 300AU. The speed of data processing remained stable during the shift. To its end the critical fusion frequency on the peripheric visual field and remote visual thresholds decreased and differentiated achromatic thresholds increased. The level of operators' functional body strain could be regarded as admissible. The above characteristics of load response of some physiologic systems were assumed to be variants of an adaptable norm. The proposed preventive measures assisted in decreasing operators' functional body strain.
Subject(s)
Hemodynamics/physiology , Occupational Medicine/standards , Psychomotor Performance/physiology , Stress, Psychological/etiology , Television/standards , Video Recording/standards , Humans , Russia , Stress, Psychological/physiopathology , Work Capacity EvaluationABSTRACT
A series of changes in sensory sphere take place in conditions of extremal and unusual influences. These changes are determined directly by processes at the receptor level and indirectly--by the central interaction. In spite of great variety of the influences, there are some general laws in changes of functional state of afferent systems analogous to biophysical and neurophysiological processes. The evaluation of functional state of sensory systems in such conditions can only proceed on ergonomic base taking into consideration the sensory fatigue as well.
