In OpenNeuro ds004774 v1.0.0, expert CCEP annotations give no labels for SEEG contacts

This report asked whether expert visual annotations in OpenNeuro ds004774 (ER-Detect) could serve as a reference for measuring how many single electrical pulses are needed to detect cortico-cortical evoked potentials (CCEPs) at stereoelectroencephalography (SEEG) contacts. In ds004774 v1.0.0, none of 1,644 SEEG stimulation-pair by channel cells had a response (1) or no-response (0) label across sub-MAYO01, sub-MAYO02, and sub-MAYO05; both available raters for sub-MAYO05 had no labelled SEEG cells. By comparison, 74.7%–94.6% of electrocorticography (ECOG) cells had labels across subjects and raters. sub-MAYO03 and sub-MAYO04 had no SEEG-typed channels, and all UMCU subjects had only ECOG-typed channels. Therefore, this dataset does not provide an expert reference for SEEG CCEP detection. The annotation codebook was not found; values -1, 2, and NaN were treated as unlabelled, and the SEEG conclusion is unchanged because those rows contain only NaN values and six -1 cells in sub-MAYO02. Epoch extraction ran for sub-MAYO01 and sub-MAYO02, with a CRC block failure reported for one sub-MAYO01 channel (3,969 blocks skipped); the reader hung for sub-MAYO05. Pulse-subsampling analysis produced zero observations because SEEG labels were absent. The package preserves the data coverage results, figure, source metadata, retrieval recipes, and unfinished analysis code.

cortico-cortical evoked potentials · CCEP · stereoelectroencephalography · SEEG · electrocorticography · expert annotation · OpenNeuro · ER-Detect · annotation coverage