Alzheimer's disease qEEG: spectral analysis versus coherence. Which is the best measurement?

Abstract:

:There is evidence in electroencephalography that alpha, theta and delta band oscillations reflect cognitive and memory performances and that quantitative techniques can improve the electroencephalogram (EEG) sensitivity. This paper presents the results of comparative analysis of qEEG variables as reliable markers for Alzheimer's disease (AD). We compared the sensitivity and specificity between spectral analysis (spectA) and coherence (Coh) within the same group of AD patients. SpectA and Coh were calculated from EEGs of 40 patients with mild to moderate AD and 40 healthy elderly controls. The peak of spectA was smaller in the AD group than in controls. AD group showed predominance of slow spectA in theta and delta bands and a significant reduction of inter-hemispheric Coh for occipital alpha 2 and beta 1 and for frontal delta sub-band. ROC curve supported that alpha band spectA was more sensitive than coherence to differentiate controls from AD.

journal_name

Arq Neuropsiquiatr

authors

Anghinah R,Kanda PA,Lopes HF,Basile LF,Machado S,Ribeiro P,Velasques B,Sameshima K,Takahashi DY,Pinto LF,Caramelli P,Nitrini R

doi

10.1590/s0004-282x2011000700004

subject

Has Abstract

pub_date

2011-12-01 00:00:00

pages

871-4

issue

6

eissn

0004-282X

issn

1678-4227

pii

S0004-282X2011000700004

journal_volume

69

pub_type

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