title: [EEG studies in Alzheimer dementia and multi-infarct dementia at various times of the day].
abstract: From three men and seven women (mean age 70 years) with dementia of the Alzheimer-type (DAT), and from four men and six women (mean age 77 years) with multi-infarct dementia (MID) closed-eye EEGs were registered at 0800, 1200, 1600, and 2000 hours and recorded on tape for computer processing. The data of both groups were compared statistically and also compared with data of former investigations conducted with 10 healthy elderly volunteers and 10 patients who suffered from cerebral arteriosclerosis with serious disorder of sleep-walking rhythm (HA). Most pathological EEG deviations are found in the MID-patients, but there is no significant distinction compared to the DAT-patients, although three of the latter showed normal EEGs. Compared to the HA the EEGs of the MID-patients differed more from those of the healthy volunteers; however, the physiological circadian variations were not leveled as in the HA. Even in consideration of daytime dependent fluctuations of frequency-parameters, a clear-cut discrimination between DAT and MID by means of the EEG seems impossible.
authors.affiliation: Abteilung Psychiatrie im Zentrum Nervenheilkunde, Universität Kiel.
authors.forename: K L
authors.initials: KL
authors.lastname: Wendland
authors.forename: T
authors.initials: T
authors.lastname: Zarnitz
authors.forename: A
authors.initials: A
authors.lastname: Gundel
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000513:Alpha Rhythm; D000544:Alzheimer Disease / Q000175:diagnosis* / Q000503:physiopathology; D001931:Brain Mapping / Q000295:instrumentation; D002540:Cerebral Cortex / Q000503:physiopathology; D002940:Circadian Rhythm / Q000502:physiology*; D003700:Delta Rhythm; D015161:Dementia, Multi-Infarct / Q000175:diagnosis* / Q000503:physiopathology; D004569:Electroencephalography / Q000295:instrumentation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012815:Signal Processing, Computer-Assisted; D013826:Theta Rhythm
vernacular_title: EEG-Untersuchungen bei Demenz vom Alzheimer-Typ und Multiinfarktdemenz zu verschiedenen Tageszeiten.