title: [Quantified EEG in the diagnosis of Alzheimer's type dementia].
abstract: 79 subjects (mean age 70.2 ans, 31 males, 48 females) selected as probable dementia of the Alzheimer type, at the early stage of the disease and 17 normal aged people (mean age: 72.2, 5 males, 12 females) were recorded with a 16 channel computerized-EEG (C-EEG) with topographical analysis of the observed changes and with classical visual analysis of the EEG. Quite simple C-EEG parameters as mean dominant frequency (MF) and alpha to theta ratio are able to discriminate patients from normal with a greater accuracy than visual analysis. The values of 8.6 for the MF and 1.3 for the alpha/theta ratio are proposed as cut off values between normal and DAT patients. The topographical analysis appear to be of no additional usefulness in the discrimination of the two groups.
authors.affiliation: Service de neurophysiologie clinique, hôpital Sainte-Anne, Paris, France.
authors.forename: B
authors.initials: B
authors.lastname: Gueguen
authors.forename: C
authors.initials: C
authors.lastname: Derouesné
authors.forename: M C
authors.initials: MC
authors.lastname: Bourdel
authors.forename: S
authors.initials: S
authors.lastname: Guillou
authors.forename: E
authors.initials: E
authors.lastname: Landre
authors.forename: J
authors.initials: J
authors.lastname: Gaches
authors.forename: H
authors.initials: H
authors.lastname: Hossard
authors.forename: D
authors.initials: D
authors.lastname: Ancri
authors.forename: M
authors.initials: M
authors.lastname: Mann
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000175:diagnosis* / Q000503:physiopathology; D001921:Brain / Q000503:physiopathology*; D001931:Brain Mapping; D003627:Data Interpretation, Statistical; D016002:Discriminant Analysis; D004569:Electroencephalography / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012815:Signal Processing, Computer-Assisted
vernacular_title: Apport de l'EEG quantifié au diagnostic de démence de type Alzheimer.