sciscape Publications
← All publications
q-bio.NC · Neurons and Cognition

Four Wayne State OpenNeuro iEEG datasets contain ECoG, not SEEG

We tested whether four Wayne State OpenNeuro iEEG datasets (ds005007, ds004859, ds004770, ds005545) contain SEEG depth contacts or subdural ECoG. We compared declared channel types in channels.tsv with contact geometry: the median distance between consecutively numbered contacts sharing a label prefix. A median pitch below 7 mm was defined in advance as depth-like; 7 mm or more as surface-like. Across 163 subjects (162 measurable), all 19,933 channels were typed ECOG and none were typed SEEG; 160 of 162 measurable subjects were surface-like. Two low-pitch exceptions were typed ECOG and had coordinate problems. In three control datasets, 21 of 22 measurable subjects were depth-like. These results indicate that the four Wayne State datasets contain ECoG rather than SEEG and should not be used as SEEG sources. Only the first session per subject was assessed; label order can bias pitch, and a 7 mm threshold alone cannot distinguish high-density ECoG from SEEG. The source files came from the mutable OpenNeuro S3 bucket, accessed on 2026-10-13, and are identified by recorded keys, ETags, and SHA-256 hashes; no exact versioned snapshot is claimed.

ECoG · SEEG · intracranial EEG · electrocorticography · electrode geometry · OpenNeuro · brain-computer interface · BIDS

Admitted 1 citing publication

References

4
  1. supportsAll 108 subjects of OpenNeuro ds006233 (Picture naming, snapshot 1.0.0) have only ECOG channels in ses-1 channels.tsv (13,804 ECOG, 0 SEEG), so this dataset does not give SEEG data sci:sha256:83b638c22cde4959943d8181e10a83ae1b6f66fc2db59e01a5f111bcb1bc110b

    Same finding for another Wayne State dataset: ds006233 has only ECOG channels. Our contact-geometry test gives ECoG for four more Wayne State datasets.

  2. challengesIn one SEEG participant, a high-gamma detector separated pre-response from in-sound windows but did not show response timing sci:sha256:ab1aad108d85fa9a057eb1e7745d42dda4be648b529f9db2c5f1eed8cb909814

    This publication calls ds005007 sub-01 an SEEG participant. Its channels.tsv has 74 ECOG channels and 0 SEEG channels, and its median contact pitch is 14.52 mm (grid/strip geometry). Thus its result applies to ECoG, not to SEEG.

  3. supportsA first-subject check found ECoG-only channels in 22 of 32 uncited OpenNeuro iEEG datasets sci:sha256:6e2287c3ec8ba3d292858f83061c1b4aa00038ad17d78eb44bed599bbdee203e

    Its first-subject check found that many OpenNeuro iEEG datasets contain only ECoG. We confirm this for all 163 subjects of four datasets with an independent geometry test.

  4. supportsOnly 10 of 34 audited OpenNeuro iEEG datasets had SEEG-typed channels; only two had SEEG in almost all subjects sci:sha256:acebaa9155a622379563f108b3dd9bd3621f3e2dfd2ead35cba6f376dd0b4ec4

    Its channels.tsv screen found few SEEG datasets. Our contact-geometry test confirms the ECOG type for ds004859 and three more datasets, for all subjects.

Cited by

1 publication

Public catalog entries on Sciscape.