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Spline Interpolation of the Scalp EEG

Modern dense array EEG systems make use of up to 256 electrode arrays across the scalp where, during data collection, the 256 amplifier channels record 256 voltages relative to single common reference electrode. To render the measured potentials graphically, a method for estimating scalp potentials in between electrode locations is needed. As described in EGI's Technical Note "Spline Interpolation of the Scalp EEG", the method was first developed in the context of geophysics and was later imported to EEG.

This described methodology is practically implemented in the graphical rendering of Net Station's Two-Dimensional Topographic Maps, the Current Density feature in Net Station Review and the Net Station Bad Channel Replacement Tool. 


Additional Info

  • Product Type: Net Station 5
  • Information Type: Theoretical Background
Last modified on Wednesday, 01 February 2017 18:44

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