title: Sleep and depression: a case study of EEG sleep prior to relapse.
abstract: By chance, we were able to record for five consecutive nights the sleep of a 61-year-old woman before each of two successive depressive episodes. In this patient, marked changes in EEG sleep (notably a decline in "sleep efficiency") preceded both episodes. These changes are considered to be of predictive, but not of etiological, significance.
mesh_terms: D001714:Bipolar Disorder / Q000523:psychology*; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008875:Middle Aged; D012008:Recurrence; D012894:Sleep Stages; D012895:Sleep, REM