The five percent electrode system for high-resolution EEG and ERP measurements.
OBJECTIVE
A system for electrode placement is described. It is designed for studies on topography and source analysis of spontaneous and evoked EEG activity.


METHODS
The proposed system is based on the extended International 10-20 system which contains 74 electrodes, and extends this system up to 345 electrode locations.


RESULTS
The positioning and nomenclature of the electrode system is described, and a subset of locations is proposed as especially useful for modern EEG/ERP systems, often having 128 channels available.


CONCLUSIONS
Similar to the extension of the 10-20 system to the 10-10 system ("10% system"), proposed in 1985, the goal of this new extension to a 10-5 system is to further promote standardization in high-resolution EEG studies.
Department of Clinical Neurophysiology, Institute of Neurology, University Hospital Nijmegen, P.O. Box 9101, NL-6500 HB Nijmegen, The Netherlands. roberto@mbfys.kun.nl
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D001931:Brain Mapping / Q000379:methods*; D004566:Electrodes; D004569:Electroencephalography / Q000295:instrumentation / Q000379:methods; D005071:Evoked Potentials; D006801:Humans; D012535:Scalp