Clinician's Road Map to Wavelet EEG as an Alzheimer's disease Biomarker
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Citações na Scopus
20
Tipo de produção
article
Data de publicação
2014
Editora
EEG & CLINICAL NEUROSCIENCE SOC (E C N S)
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Título da Revista
ISSN da Revista
Título do Volume
Autores
TRAMBAIOLLI, Lucas R.
LORENA, Ana C.
FRAGA, Francisco J.
Autor de Grupo de pesquisa
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Citação
CLINICAL EEG AND NEUROSCIENCE, v.45, n.2, p.104-112, 2014
Resumo
Alzheimer's disease (AD) is considered the main cause of dementia in Western countries. Consequently, there is a need for an accurate, universal, specific and cost-effective biomarker for early AD diagnosis, to follow disease progression and therapy response. This article describes a new diagnostic approach to quantitative electroencephalogram (QEEG) diagnosis of mild and moderate AD. The data set used in this study was composed of EEG signals recorded from 2 groups: (S1) 74 normal subjects, 33 females and 41 males (mean age 67 years, standard deviation = 8) and (S2) 88 probable AD patients (NINCDS-ADRDA criteria), 55 females and 33 males (mean age 74.7 years, standard deviation = 7.8) with mild to moderate symptoms (DSM-IV-TR). Attention is given to sample size and the use of state of the art open source tools (LetsWave and WEKA) to process the EEG data. This innovative technique consists in associating Morlet wavelet filter with a support vector machine technique. A total of 111 EEG features (attributes) were obtained for 162 probands. The results were accuracy of 92.72% and area under the curve of 0.92 (percentage split test). Most important, comparing a single patient versus the total data set resulted in accuracy of 84.56% (leave-one-patient-out test). Particular emphasis was on clinical diagnosis and feasibility of implementation of this low-cost procedure, because programming knowledge is not required. Consequently, this new method can be useful to support AD diagnosis in resource-limited settings.
Palavras-chave
quantitative EEG (QEEG), Alzheimer's disease, wavelets, support vector machine (SVM)
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