The five percent electrode system for high-resolution EEG and ERP measurements

Clin Neurophysiol. 2001 Apr;112(4):713-9. doi: 10.1016/s1388-2457(00)00527-7.


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.

MeSH terms

  • Brain Mapping / methods*
  • Electrodes*
  • Electroencephalography* / instrumentation
  • Electroencephalography* / methods
  • Evoked Potentials*
  • Humans
  • Scalp