| The five percent (5%) or 10-5 electrode system |
This electrode scheme is an extension of the famous 10-20 system to accomodate large number of electrodes. The 5% electrode system contains the standard locations of the original 10-20 system (see image to the side, click image to enlarge) and those of the 10-10 system. Due to the small inter-electrode distances the caps allows the positioning of more than 300 electrodes. Since this system is a logical extension of the 10-20 system we have used a smart color coding of all electrodes on the Waveguard cap. This makes it easier to the find the different electrodes on the cap. In the case of a 128-channel cap, the first 32, second 32 electrodes and so on have different colors. The colors used for each subset corresponds to the same colors we show on the ANT mousepad. |  |
10-5 electrode system - available caps
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Details regarding this electrode system including an explanation of the nomenclature for the electrode locations can be found a paper by Oostenveld and Praamstra (reference below). |
The five percent electrode system Reference: The five percent electrode system for high-resolution EEG and ERP measurements. Clin Neurophysiol. 2001 Apr;112(4):713-9. Oostenveld R, Praamstra P.Abstract OBJECTIVE: A system for electrode placement is described. It is designed for studies on topography and source analysis of spontaneous and evoked EEG activity. METHOD: 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. CONCLUSION: 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. | ||
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