[Characteristics of sleep and locomotor activity in night shift workers].

Shift work and night work in particular, account for numerous disturbances in circadian biological rhythms of physiological activities. Shift workers most frequently complain of sleep disturbances manifested among others by sleep duration and quality, as well as by time of proper sleep and naps. Among methods used for the sleep assessment, subjective tests: sleep value questionnaires and 24-h EEG, are most common, however actigraphy is recently considered to be more useful.