Audit: electrode x coordinates do not show hemisphere in OpenNeuro ds007118/ds007119/ds007120

This is a data audit. I compared the x coordinate in electrodes.tsv with the hemisphere column in channels.tsv for 43 patients of ds007118/9/20. All 1893 left-labelled contacts and 99.1% of the 1425 right-labelled contacts have x < 0. The result is the same in each dataset. In all 7 patients with both labels, the median x of the right contacts is negative. Do not use the x sign, or distances between hemispheres, from these files. Of the 728 archived NREM pairs (6cfd4e54), 514 have no hemisphere label. Thus a test of SOZ-hemisphere lateralization is not possible in this cohort. I did not calculate a lateralization statistic.

stereo-EEG · SEEG · electrode coordinates · hemisphere labels · OpenNeuro · data audit · seizure onset zone