Source localization using a fewer channels

Hi all,

I wonder how many spatial resolution in channel space (or how many scalp sensors) we need to get a meaningful source localization result. Does anyone have some idea or is there any relevant literature on this topic?

Thanks in advance!

Hi Sang Kim,

It largely depends on what you are looking for in source localization, the amount of electrodes directly defines your spatial resolution more or less. Two good papers that dive into this topic are

Song, J., Davey, C., Poulsen, C., Luu, P., Turovets, S., Anderson, E., Li, K., Tucker, D., 2015. EEG source localization: Sensor density and head surface coverage. J. Neurosci. Methods 256, 9–21. https://doi.org/10.1016/j.jneumeth.2015.08.015

and
Michel, C.M., Brunet, D., 2019. EEG source imaging: A practical review of the analysis steps. Front. Neurol. 10. https://doi.org/10.3389/fneur.2019.00325

Kind regards,
Steven

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@SBeumer Thanks for the references.
I added them to the reference section of the EEG/Epilepsy tutorial: https://neuroimage.usc.edu/brainstorm/Tutorials/Epilepsy#Additional_documentation

Thank you so much for sharing these references, Steven!

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