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The "10" and "20" refer to the fact that the actual distances between adjacent electrodes are either 10% or 20% of the total front–back or right–left distance of the skull. For example, a measurement is taken across the top of the head, from the nasion to inion. Most other common measurements ('landmarking methods') start at one ear and end ...
Electrode locations of International 10-20 system for EEG (electroencephalography) recording: Date: 30 May 2010: Source: Own work: Author: トマトン124 (talk) Permission (Reusing this file) Public domain
10-20 system (EEG), an electrode placement method used in electroencephalography systems Topics referred to by the same term This disambiguation page lists articles associated with the title 10-20 system .
An EEG recording setup using the 10-10 system of electrode placement. EEG is the gold standard diagnostic procedure to confirm epilepsy.The sensitivity of a routine EEG to detect interictal epileptiform discharges at epilepsy centers has been reported to be in the range of 29–55%. [8]
English: EEG electrode positions in the 10-10 system using modified combinatorial nomenclature as presented by Klem, Lüders, Jasper, & Elger (1999). The electrode sites are colour-coded according to the lobes of the brain which their labels (F, C, P, O, and T) represent.
Subdural strip and grid electrodes are also widely used in various dimensions, having anywhere from 4 to 256 [10] electrode contacts. The grids are transparent, flexible, and numbered at each electrode contact. Standard spacing between grid electrodes is 1 cm; individual electrodes are typically 5 mm in diameter.
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Electrode placement is extremely important to elicit a good VEP response free of artifact. In a typical (one channel) setup, one electrode is placed 2.5 cm above the inion and a reference electrode is placed at Fz. For a more detailed response, two additional electrodes can be placed 2.5 cm to the right and left of Oz.