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Nonlinear Dynamic Analysis Using Lyapunov Exponent of EEG in Patients with Schizophrenia / 대한정신약물학회지
Korean Journal of Psychopharmacology ; : 67-72, 1998.
Artigo em Coreano | WPRIM | ID: wpr-191200
ABSTRACT
OBJECT It seemed worthwhile to estimate nonlinear measures of the electroencephalogram (EEG) in schizophrenic patients, because nonlinear measures might serve as indicators of the specific brain function in schizophrenia.

METHOD:

Previous studies which estimated the chaoticity in the brain of schizophrenia with nonlinear methods recorded the EEGs at limited electrodes, so we tried to record EEGs from 16 channels for nonlinear analysis in 19 patients with Schizophrenia and 8 healthy control subjects. We employed a new method to calculate the nonlinear invariant measures. For limited noisy data, this algorithm was strikingly faster and more accurate than previous ones.

RESULTS:

Our results showed that the schizophrenic patients had lower values of the largest positive Lyapunov exponent at the left inferior frontal and anterior temporal head regions compared with normal controls.

CONCLUSIONS:

These results suggest that the nonlinear analysis of the EEGs such as the estimation of the largest positive Lyapunov exponent seems to be a useful tool in analyzing EEG data to explore the neurodynamics of the brain of schizophrenic patients.
Assuntos

Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Esquizofrenia / Encéfalo / Dinâmica não Linear / Eletrodos / Eletroencefalografia / Cabeça Limite: Humanos Idioma: Coreano Revista: Korean Journal of Psychopharmacology Ano de publicação: 1998 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Esquizofrenia / Encéfalo / Dinâmica não Linear / Eletrodos / Eletroencefalografia / Cabeça Limite: Humanos Idioma: Coreano Revista: Korean Journal of Psychopharmacology Ano de publicação: 1998 Tipo de documento: Artigo