Sleep electroencephalograms development

With the advent of a standardized sleep laboratory recording technique and scoring system [Rechtschaffen and Kales 1968] and the development of the computerized sleep electroencephalogram [EEG] analysis method (Borbely et al. 1984 Feinberg et al. 1980 Ktonas 1987 Kupfer et al. 1984 Mendelson et al. 1987a J. E. Shipley et al. 1988 Soldatos 1979], the study of sleep in depression became one of the major areas of sleep research. The sleep recordings of depressed patients were shown to be distinctly different... 

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