[EEG spectral analysis in sylvian ischemia with normal value tracings].
The EEG power spectral analysis of 8 patients with a definite sylvian ischemia, the standard EEG of which was normal, was determined in comparison with the date of a control group (N = 14). We calculated the right-left power spectral differences in 4 symmetrical bipolar leads for 5 rhythms (delta: 1.2-3.1 Hz, theta: 3.5-7 Hz, alpha: 7.4-12.3 Hz, beta 1: 12.9-14.1 Hz and beta 2: 15.2-17.2 Hz). For each patient, the spectral difference is measured in comparison with the normal range of the control group with an alpha risk of 5%. There are 54 asymmetries favouring the lesioned side (mostly in 5 patients) and 6 the opposite, without predominance of a particular rhythm with the exception of the beta 2 rhythm which presents no asymmetries.
Clinique neurologique, CHU Bretonneau, Tours, France.
B
B
de Toffol
A
A
Autret
E
E
Degiovanni
F
F
Laffont
B
B
Lucas
F
F
Paivet
S
S
Roux
D000368:Aged; D002545:Brain Ischemia / Q000503:physiopathology*; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012016:Reference Values
Analyse spectrale de l'EEG dans les ischémies sylviennes avec traces standard normales.