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- W19496671 abstract "The most common electroencephalography (EEG) findings in moderate and advanced stages of dementia disease are the background frequency increase in δ- and Ѳ-activities and the decrease or dropout of α-activity. It was found, while studying patients with Alzheimer disease (AD) and vascular dementia (VD), that a decrease in α-activity is present in both the groups that agree with several other works done in the past decade. Spectral analyses have been considered very sensitive to EEG background changes and agree strongly with clinical AD suspects. The sensitivity of this method is 71%-81%. When spectral analyses are compared with neuropsychological tests, again, there is a strong correlation between both. Another tool for EEG activity analysis is the coherence analysis used to evaluate the level of covariance of spectral components between the pairs of electrodes sites. High coherence has been considered a structural and functional evidence of the connections between the pairs of brain cortical areas. In a study, using the same methodology, comparing a α1-band coherence between young healthy adult subjects under 50 and healthy group over 50, researchers did not find any significant difference between them. Future studies of quantitative analysis of EEG (qEEG) need to be accomplished to assess whether this method is clinically useful in predicting an AD diagnosis." @default.
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- W19496671 date "2002-01-01" @default.
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- W19496671 title "Chapter 40 Quantitative electroencephalography in dementia diagnosis" @default.
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- W19496671 doi "https://doi.org/10.1016/s1567-424x(09)70460-x" @default.
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