title: The electroencephalogram sleep patterns of middle-aged males.
mesh_terms: D000328:Adult; D000367:Age Factors; D004569:Electroencephalography; D004585:Electrooculography; D006801:Humans; D008297:Male; D008875:Middle Aged; D012737:Sex Factors; D012890:Sleep; D007319:Sleep Initiation and Maintenance Disorders; D012894:Sleep Stages; D012895:Sleep, REM; D013997:Time Factors; D014851:Wakefulness