A statistical technique for measuring synchronism between cortical regions in the EEG during rhythmic stimulation.

Mauricio, A; Miranda de Sá, F L; Infantosi, A F; Simpson, D M

Mauricio, A; Miranda de Sá, F L; Infantosi, A F; Simpson, D M.

Afiliação

Mauricio A; Department of Electricity, Federal Institution of Higher Education of São João del Rei, Brazil.

IEEE Trans Biomed Eng ; 48(10): 1211-5, 2001 Oct.

Article em En | MEDLINE | ID: mdl-11585047

RESUMO

The coherence function has been widely applied in quantifying the degree of synchronism between electroencephalogram (EEG) signals obtained from different brain regions. However, when applied to investigating synchronization resulting from rhythmic stimulation, misleading results can arise from the high correlation of background EEG activity. We, thus propose a modified measure, which emphasizes the synchronized stimulus responses and reduces the influence of the spontaneous EEG activity. Critical values for this estimator are derived and tested in Monte Carlo simulations. The effectiveness of the method is illustrated on data recorded from 12 young normal subjects during rhythmic photic stimulation.

Assuntos

Eletroencefalografia/métodos; Processamento de Sinais Assistido por Computador; Adolescente; Criança; Sincronização Cortical; Humanos; Método de Monte Carlo; Estimulação Luminosa

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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Processamento de Sinais Assistido por Computador / Eletroencefalografia Tipo de estudo: Health_economic_evaluation Limite: Adolescent / Child / Humans Idioma: En Revista: IEEE Trans Biomed Eng Ano de publicação: 2001 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos

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