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Proceedings Paper

Images of thought measured with high-resolution EEGs
Author(s): Alan Gevins
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Paper Abstract

The spatial detail of the EEG has been greatly improved by increasing the number of recording electrodes from the usual 19 to over 120, and by developing mathematical procedures which use realistic finite element models of the head and brain to correct blur distortion produced by conduction through the skull and other tissues. Registration of EEGs with 3-D models of the cortex derived from each subject's MRI has also been accomplished. The result of these procedures is an estimate of the EEG on the exposed brain surface from recording made at the scalp. Examples of deblurred sensory and cognitive evoked potentials are presented, including an initial validation by comparison with subdural grid recordings from epileptic patients.

Paper Details

Date Published: 27 August 1993
PDF: 2 pages
Proc. SPIE 1887, Physiological Imaging, Spectroscopy, and Early-Detection Diagnostic Methods, (27 August 1993); doi: 10.1117/12.151185
Show Author Affiliations
Alan Gevins, EEG Systems Lab. and SAM Technology (United States)

Published in SPIE Proceedings Vol. 1887:
Physiological Imaging, Spectroscopy, and Early-Detection Diagnostic Methods
Randall Locke Barbour; Mark J. Carvlin, Editor(s)

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