Bipolar channel tables did not match EDF labels in 33 public SEEG files from 29 patients

We tested channel maps in public OpenNeuro ds006254. We checked headers from 33 EDF files from 29 patients. We also checked samples from 99 one-second windows. One other EDF file returned an access error. None of the 5,826 SEEG labels in the channel tables matched an EDF label. All 33 files had different signal and table counts. A simple row map also failed a reverse-pair voltage check. Of 1,482 sampled checks, 1,475 exceeded a conservative quantization bound. This check assumed pair subtraction from the same sampled contacts, equal processing, and no added channel noise. It did not identify the hardware reference. We built a tool that refuses an unmatched channel map. The package contains digital samples, headers, source versions, code, results, and three figures. Two session paths had the same annex key and sampled bytes. This audit supports source clarification before BCI calibration. It does not test a decoder or clinical benefit.

stereo-electroencephalography · SEEG · intracranial EEG · channel mapping · electrode labels · EDF · BIDS · brain-computer interface · signal processing · reproducibility