Comparison of the delta EEG in the first and second non-REM periods in depressed adults and normal control
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2001, Biological PsychologyCitation Excerpt :Healthy subjects usually show a decrease of delta sleep from the first to the second Non-REM period, whereas no such decline or even an increase was noted in depressive patients. However, Armitage et al. (1992) were unable to confirm an abnormal delta-sleep ratio in depressives. To summarize, in accordance with many of the studies with visually scored SWS who failed to detect differences between depressives and healthy controls, the data base of studies using automated analysis does not give strong support for the inital assumption of the two-process model of reduced SWS or delta-power in depression.
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All authors are affiliated with the University of Texas Southwestern Medical Center at Dallas. Roseanne Armitage, Ph.D., is Assistant Professor of Psychiatry and Psychology, and Director of Clinical Research in the Sleep Study Unit. J. Scott Calhoun, B.A., was a Research Assistant in the Sleep Study Unit. Howard P. Roffwarg, M.D., is Professor and Director in Research in the Department of Psychiatry and Director of the Sleep Study Unit. A. John Rush, M.D., holds the Betty Jo Hay Chair in Psychiatry and is Director of the Mental Health Clinical Research Center.