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Recording cortical EEG subcortically — Improved EEG monitoring from depth-stimulation electrodes

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9 Author(s)
Katrina Wendel ; Department of Biomedical Engineering, Tampere University of Technology, Tampere, Finland ; Kalervo Suominen ; Pasi Kauppinen ; Eila Sonkajärvi
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The electroencephalogram (EEG) generated by cerebral cortex can be recorded far away from the cortex, analogous to the electrocardiogram (ECG) that can be recorded far from the heart. ECG is often seen as an artifact in EEG recordings. In this paper we demonstrate that the burst suppression pattern of EEG, which is generated by the cerebral cortex, can be recorded at a distance from the cortex with a pair of electrodes in the subthalamic nucleus and also with an electrode pair on the masseter muscle below the zygomatic arch. We then present a fundamental theoretical model which explains the currents inside and outside the cranium, which produce the EEG at these locations.

Published in:

Noninvasive Functional Source Imaging of the Brain and Heart & 2011 8th International Conference on Bioelectromagnetism (NFSI & ICBEM), 2011 8th International Symposium on

Date of Conference:

13-16 May 2011