Quantitative analysis of the EEG in the intracarotid amobarbital procedure. I. Amplitude analysis

Electroencephalography and Clinical Neurophysiology
G L AhernK J Oommen

Abstract

Thirty-seven subjects underwent bilateral internal carotid artery injections of amobarbital prior to surgery for intractable epilepsy. The electroencephalogram (EEG) of these patients was continuously monitored during these 74 procedures and was later subjected to quantitative analysis. Topographic mapping of these data suggested that the areas of inactivation were largely restricted to the anterior 2/3 of the hemisphere injected, corresponding to the vascular distributions of the anterior and middle cerebral arteries. Graphical representation of the data demonstrated that delta and theta band activity peaked in the first 2 min post injection and decreased gradually thereafter, becoming stable at around 12 min post injection. Examination of the alpha, beta 1, and beta 2 bands suggested that activity increased and decreased more gradually than that for delta and theta, with perhaps a longer latency. Although EEG changes were most prominent in the anterior 2/3 of the inactivated hemisphere, similar (though smaller) changes were also observed in both ipsilateral and contralateral zones thought to be outside of the vascular distribution of the internal carotid artery.

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Citations

Jul 1, 1994·Electroencephalography and Clinical Neurophysiology·G L AhernK J Oommen
Jul 1, 1997·Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society·J N Acharya, D S Dinner
Oct 7, 2008·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Julian F ThayerGeoffrey L Ahern
Sep 6, 2008·Neuroscience and Biobehavioral Reviews·Julian F Thayer, Richard D Lane
Dec 22, 2006·Biological Psychology·Julian F Thayer, Richard D Lane
Apr 8, 2006·Brain and Cognition·Paul S Foster, David W Harrison
Sep 12, 2002·IEEE Engineering in Medicine and Biology Magazine : the Quarterly Magazine of the Engineering in Medicine & Biology Society·Julian F Thayer, Greg J Siegle
Jul 24, 2008·Dose-response : a Publication of International Hormesis Society·Julian F Thayer
Jul 12, 2005·Psychoneuroendocrinology·Julian F Thayer, Jos F Brosschot
May 15, 2002·Scandinavian Journal of Psychology·Julian F Thayer, Bruce H Friedman

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