[The mathematical rationale for the clinical EEG-frequency-bands. 1. Factor analysis with EEG-power estimations for determining frequency bands]. / Mathematische Rationale für die klinischen EEG-Frequenzbänder. 1. Faktorenanalyse mit EEG-Powerspektralschätzungen zur Definition von Frequenzbändern.
EEG EMG Z Elektroenzephalogr Elektromyogr Verwandte Geb
; 9(3): 146-54, 1978 Sep.
Article
em De
| MEDLINE
| ID: mdl-100309
ABSTRACT
In order to determine whether the clinically used frequency bands of the EEG can also be obtained by a mathematical system we did a factor analysis with 480 EEG recordings, 5 minutes each, in 60 healthy male volunteers. A power spectrum analysis was done and 57 frequency bands between 1.5 and 30.0 Hz in a half Hz steps were calculated. The factor structure obtained made the following frequency bands (Hz) reasonable deltaF = 1.5 - 6.0, thetaF = 6.0 - 8.5, alpha1F = 8.5 - 10.5, alpha2F = 10.5 - 12.5, beta1F = 12.5 - 18.5, beta2F = 18.2 - 21.0, beta3F = 21.0 - 30.0. Except for alpha1F all other 6 frequency bands were represented by one general factor with the complexity 1. The variance of the alpha1F band is explained by several of the 6 factors. The clinically known and the by factor analysis obtained frequency bands in the beta-range are similar. The clinically alpha-band is subdivided into two frequency bands alpha1F and alpha2F by the factor analysis. The clinically known border line between delta- and theta-band of 3.5 Hz cannot be found by factor analysis.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Eletroencefalografia
/
Matemática
Limite:
Adult
/
Humans
/
Male
/
Middle aged
Idioma:
De
Revista:
EEG EMG Z Elektroenzephalogr Elektromyogr Verwandte Geb
Ano de publicação:
1978
Tipo de documento:
Article