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 Neuropsiquiatrjournal_title
Arquivos de neuro-psiquiatriaauthors
Anghinah R,Kanda PA,Lopes HF,Basile LF,Machado S,Ribeiro P,Velasques B,Sameshima K,Takahashi DY,Pinto LF,Caramelli P,Nitrini Rdoi
10.1590/s0004-282x2011000700004subject
Has Abstractpub_date
2011-12-01 00:00:00pages
871-4issue
6eissn
0004-282Xissn
1678-4227pii
S0004-282X2011000700004journal_volume
69pub_type
杂志文章abstract::Prevalence of "bayonet finger", a semiologic sign of attention deficit and hyperactivity disorder (ADHD), was determined in male illicit drug users, admitted in psychiatric hospital. A control group, paired in sex, age and social status, was built from the general population. The sign was observed en 165/345 (47.8%) d...
journal_title:Arquivos de neuro-psiquiatria
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journal_title:Arquivos de neuro-psiquiatria
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journal_title:Arquivos de neuro-psiquiatria
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journal_title:Arquivos de neuro-psiquiatria
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journal_title:Arquivos de neuro-psiquiatria
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journal_title:Arquivos de neuro-psiquiatria
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journal_title:Arquivos de neuro-psiquiatria
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journal_title:Arquivos de neuro-psiquiatria
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journal_title:Arquivos de neuro-psiquiatria
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