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1.5.2 Electrode positioning
Clinical EEG is measured using the 10-20 International standardized system for
electrode placement. The montage is with electrodes attached to the scalp at
locations defined by certain anatomical reference points; the numbers 10 and 20
signify relative distances between different electrode locations on the skull surface
[5]. Electrode placements (Figure 1.8) are labeled according to adjacent brain areas:
F(frontal), C(central), T(temporal), P(posterior), O(occipital) [19]. The numbering
represents left lobe (odd) and right lobe (even)
Figure 1.8: Original 10-20 elecrode placement system with 19 electrodes (B) the
extended one has 70 (C). Adopted from ( [20])
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