How to add channel locations for ESG data in BIDS?

Hi NeuroStars,

I would like to share data sets from three different experiments that include simultaneous electroencephalography (EEG) and electrospinography (ESG) recordings. At the moment ESG channels are classified as MISC channels. However, I would still like to add the locations of ESG. I have between 40 and 80 ESG channels and since there is no standard for naming their position remains unclear. I do not know how to best add the locations of the electrode over the spinal cord in the BIDS format. Any recommendations?

Best wishes

Birgit Nierula