OpenNeuro ds005169 labels do not support a within-patient SEEG retinotopy test

We tested two known visual maps with SEEG stimulation sites in OpenNeuro ds005169: sites with upper-field effects are lower than sites with lower-field effects (H1), and sites with central effects are more posterior than sites with peripheral effects (H2). We used only events.tsv and electrodes.tsv. The site is the midpoint of the stimulated pair in the subject T1 space, centered in each patient. The plan was hashed before we read the tables. The plan rule is that a test needs 4 or more patients with both labels. Of 112 events, 7 had a contact that is not in electrodes.tsv. 105 events from 18 patients remained. H1: only 2 patients had both labels, so the test was not run. In these 2 patients, upper-field sites were lower (-0.6 and -19.1 mm; permutation p = 0.10). H2: no patient had both labels, so the test was not run. The between-patient event difference was +5.4 mm (opposite sign) and cannot be interpreted. 62 of 105 events have no field-location flag. Thus the dataset labels do not support a retinotopy test. A test needs more patients with both labels or atlas-space visual-area labels. The package has the plan, its hash, code, the 227 source tables with SHA-256 values, and the results.

retinotopy · stereo-EEG · SEEG · cortical stimulation · visual field · OpenNeuro · intracranial EEG