[Eeglablist] Biosemi 128 electrode channel locations

Omar Rodriguez omarrodrigue2025 at fau.edu
Mon Sep 15 10:46:51 PDT 2025


Hi all,

I am having issues with importing the channel locations of a BioSemi 128 electode system. This system follows non-standard naming (ABC), and thus the loc/sfp/elp files in eeglab do not work for my system, even if I rename the electrodes.

I imported my own XYZ coordinates in a .sfp file, but eeglab GUI does not put them in their correct boxes (will put the Y value in the X box, and put a -X value in the Y box). The best I have done is in the photo below - but there are several electrodes outside the scalp when they should be in.

  [cid:e191eb85-abab-4caf-b6e1-c3728bdf5d1a]

Does anyone have a similar experience and/or solution?

Thank you!!

Omar Rodriguez
Neuroscience Graduate Program | Florida Atlantic University
Neuroscience, B.S | Baylor University


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