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• W2493468424 abstract "In 32 chronic patients the EEG in temporal and occipito-parietal bipolar leads was analyzed with a manual method giving a period frequency index. The cerebral oxygen uptake (CMRO2) was calculated from the arteriovenous oxygen difference between samples from the internal carotid artery and the jugular bulb respectively, and from measurement of cerebral blood flow with the 133Xenon clearance method. A strong correlation (r = 0.78, P < 0.001) was found between the EEG frequency indices and the CMRO2 of the hemisphere from which the EEG was recorded. Significant correlations between the EEG indices and gray matter cerebral blood flow were also demonstrated, while the correlation between the EEG indices and the blood flow of the white matter was weak. No correlation at all was found between the EEG indices and the relative weight of the gray matter. We conclude that the EEG carries information about the metabolic activity of the brain tissue. The EEG frequency also correlates with the blood flow of the gray matter of the brain when tissue anoxia has not uncoupled the normal function—flow relationship prevailing in the brain. Chez 32 patients, en conditions chroniques, les EEG temporal et occipito-pariétal ont été recueillis, en dérivation bipolaire et soumis à une analyse manuelle d'échantillons fournissant un indice de fréquence. La capture cérébrale d'oxygène (CMRO2) était évaluée à partir de la différence artério-veineuse en O2, entre des échantillons de la carotide interne et de la jugulaire, et à partir du débit sanguin cérébral mesuré par clearance du 133Xe. Une corrélation étroite (r = 0,78; P < 0,001) a pu être décelée entre les indices de fréquence EEG et le CMRO2 de l'hémisphère enregistré. Des corrélations significatives existent également entre les indices EEG et le débit sanguin de la substance grise; en revanche celle entre EEG et débit pour la substance blanche est faible. Aucune corrélation n'a été trouvée entre indices EEG et poids relatif de la substance grise. Nous concluons que l'EEG contient des informations relatives à l'activité métabolique du tissu cérébral. La fréquence EEG est également liée au débit sanguin au niveau de la substance grise, à condition que l'anoxie tissulaire n'ait pas désorganisé le couplage normal entre fonction et débit." @default.
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• W2493468424 date "1976-09-01" @default.
• W2493468424 modified "2023-09-27" @default.
• W2493468424 title "Correlation between dominant EEG frequency, cerebral oxygen uptake and blood flow" @default.
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• W2493468424 doi "https://doi.org/10.1016/0013-4694(76)90119-x" @default.
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