Datasets:

License:

Accept the licences of the 77 datasets to access EEGDash Corpus v0

This repository is publicly accessible, but you have to accept the conditions to access its files and content.

EEGDash Corpus v0 is a collection of 77 public EEG datasets. The collection has no licence of its own: each dataset keeps its own licence, listed with a link in LICENSES.csv and written into the dataset's buckets in the store. By requesting access you agree to: (1) use every dataset in the store under its own licence; (2) credit the corpus and every dataset you use (CITATION.bib); (3) keep the conditions that apply where you use the data they cover: non-commercial use for SparrKULee (nm000238, CC BY-NC 4.0), share-alike for the twelve CC BY-SA 4.0 datasets, the terms of the GPL-3.0 for Shin2017A (nm000267), or leave those buckets out; (4) not redistribute the store, in whole or in part, without these terms and an equivalent access gate. This summary is not legal advice; the licence texts govern.

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EEGDash Corpus v0

77 public electroencephalography (EEG) datasets, served through EEGDash from OpenNeuro and NEMAR, converted once with the preprocessing recipe of the REVE EEG foundation model into training-ready 10-second samples, in one Zarr store. Every dataset keeps its own licence; access is gated so that every user accepts them.

At a glance

quantity value
datasets 77 (56 from OpenNeuro, 21 from NEMAR)
subjects 7,272 (counted per dataset)
sessions (recordings kept) 41,133
hours at 200 Hz 14,074.7
samples (10 s, 2,000 time points) 5,045,111
tokens per epoch (samples Γ— channels Γ— 11 patches of 200 points, stride 180) 6,206,191,189 (6.21 B)
buckets (one per dataset and exact channel set) 632
channels per bucket 6–256 (111.8 duration-weighted mean)
native sampling rates 200–10,000 Hz
files in the store 44,801
size 3.60 TB on disk (3,356.8 GiB, Blosc-zstd, lossless); 4.51 TB as uncompressed float32

One dataset dominates: PEERS (ds004395) holds 64.7 % of the hours and 73.0 % of the tokens.

By paradigm

paradigm datasets subjects hours % of hours tokens % of tokens
memory & cognition 5 510 9,658.9 68.6 4.79 B 77.2
development (rest & tasks) 9 2,192 1,694.1 12.0 0.85 B 13.7
perception & emotion 20 598 671.1 4.8 0.20 B 3.2
BCI (MI & P300) 15 584 626.8 4.5 0.13 B 2.1
clinical routine EEG 1 2,413 489.0 3.5 0.04 B 0.7
resting & consciousness 9 542 318.6 2.3 0.08 B 1.2
auditory & language 6 198 312.2 2.2 0.07 B 1.1
seizure 1 14 141.0 1.0 0.02 B 0.3
learning & reward 9 155 119.8 0.9 0.03 B 0.4
SSVEP 2 66 43.2 0.3 0.01 B 0.2
total 77 7,272 14,074.7 100 6.21 B 100

The paradigm of each dataset is in the table at the end of this card. Memory & cognition is dominated by PEERS; the nine Healthy Brain Network releases (children and adolescents, resting state and a task battery) are the development group; clinical routine EEG is NMT (normal and abnormal routine recordings); seizure is Siena.

By source

source datasets subjects hours mean channels tokens % of tokens
OpenNeuro: Healthy Brain Network, releases 1–9 9 2,192 1,694.1 129 0.85 B 13.7
OpenNeuro: PEERS (ds004395) 1 364 9,110.8 126 4.53 B 73.0
OpenNeuro: other datasets 46 1,549 1,726.8 83 0.57 B 9.2
NEMAR: other datasets 21 3,167 1,542.9 42 0.26 B 4.1
total 77 7,272 14,074.7 112 6.21 B 100

By licence

licence datasets subjects hours % of hours tokens % of tokens
CC0 1.0 52 2,137 11,211.0 79.7 5.19 B 83.6
CC BY 4.0 11 400 475.1 3.4 0.08 B 1.3
CC BY-SA 4.0 (Healthy Brain Network releases 1–9, NMT, Sosulski2019, AlexMI) 12 4,626 2,203.7 15.7 0.89 B 14.4
GPL-3.0 (Shin2017A, nm000267) 1 29 29.0 0.2 0.003 B 0.06
CC BY-NC 4.0 (SparrKULee, nm000238) 1 80 155.7 1.1 0.04 B 0.6

The per-dataset list, with licence, paradigm, authors, source DOI, archive page, hours, subjects and buckets: LICENSES.csv.

Licence model

The collection has no licence of its own: it is the union of its datasets' licences. Nothing is relicensed. Each bucket carries its dataset's licence in its Zarr attributes (licence as an SPDX id, licence_url, source = the dataset's page on OpenNeuro or NEMAR); the root group carries licence: "other", licences (dataset id β†’ SPDX id, 77 entries) and licence_file: "LICENSES.csv". Using the whole store therefore means non-commercial use (SparrKULee), share-alike for the twelve CC BY-SA datasets, the GPL's terms for Shin2017A, and attribution for all 77. The permissive subset is the buckets whose licence is CC0, CC BY or CC BY-SA: 75 datasets, 98.7 % of the hours and 99.3 % of the tokens. Four NEMAR copies carry a licence label that differs from the upstream deposit (Lee2019 MI, ERP, SSVEP and Cho2017, CC0 1.0 at GigaDB); the store and LICENSES.csv follow the deposits. No legal assurance is given: check the licence of each dataset you use.

Changes to the source datasets

This section is the notice that the attribution and share-alike licences ask for: what was done to every dataset between its archive and this store. Nothing in it changes any dataset's licence.

Source. Every dataset was read through EEGDash, as the raw BIDS files of its archive: OpenNeuro for the 56 ds datasets (53 of them served from NEMAR's re-host, EEGDash id on…, the same files), NEMAR for the 21 nm datasets. The version is the one the archive served at download (OpenNeuro's versioned DOI in LICENSES.csv where the catalogue records it).

What was done to every recording, in order:

# step detail
1 read the recording file (BrainVision, EEGLAB, EDF or BDF) with MNE-Python through EEGDash
2 recordings skipped sampled below 200 Hz (none in v0); 10 s or shorter (16); unreadable (11); fewer than 3 channels with a position (3)
3 channels kept channels typed EEG in the dataset; when a recording types none as EEG, every channel whose name resolves to a scalp position. Non-EEG channels (EOG, ECG, EMG, respiration, triggers, …) are removed
4 positions each kept name matched, case-insensitively, against the position bank: the public REVE bank (brain-bzh/reve-positions, 543 names) plus MNE's biosemi160 and biosemi256 templates. Rules: a leading EEG is ignored; BioSemi ring labels (A1…H32) go to the 128-, 160- or 256-channel template by the rings the recording carries; a zero typed for the letter O (P03) is read as PO3 when the exact name fails; the same electrode twice is kept once. An EEG channel the bank lacks keeps its own name and is placed from the recording's electrodes.tsv when that file, fitted to the bank on at least 8 shared electrodes (rotation, uniform scale, translation), fits within 20 mm RMS; otherwise it is dropped
5 channel names and order the bank's spelling (the dataset's own for channels placed from electrodes.tsv), sorted alphabetically
6 band-pass 0.5–99.5 Hz, MNE's default zero-phase FIR filter; the upper edge is 0.45 Γ— the native rate when that is lower, i.e. 90 Hz for the three datasets recorded at 200 Hz (nm000146, nm000181, nm000267)
7 resampling to 200 Hz, polyphase (none for native 200 Hz)
8 values microvolts, float32
9 statistics per channel, the mean and SD of the whole processed recording, stored beside the samples
10 samples non-overlapping 10-s windows (2,000 points) from the first point; the remainder under 10 s is not stored as a sample, nor the last full window of a recording that is an exact multiple of 10 s (REVE's loader cuts this way)
11 buckets the recordings of one dataset with the same channel set appended into one group; Blosc-zstd compression, lossless

Not done. No normalisation of the stored values (the samples are band-passed microvolts: REVE z-scores each sample with its session's mean and SD and clips at 15 SD at load time; another model can apply its own rule to the same bytes), no filtering beyond the band-pass, no notch filter, no re-referencing (the reference is as recorded), no clipping, no artefact or bad-segment rejection, no interpolation of missing or bad channels. Events, annotations, participant tables and stimulus files are not copied: each session's source file (BIDS path) is kept in the bucket attributes and the manifest, so they can be joined from the archive.

Channels dropped. Every channel dropped for lack of a position is counted per session in the manifest (n_dropped_no_position; EEG-typed channels only, since channels typed otherwise are removed at step 3); n_positions_aligned counts the channels placed from electrodes.tsv. The most frequent dropped names: EOGvu, x_EMGl, x_GSR, x_Respi, x_Pulse, x_Optic (1,060 sessions each), EMG1–EMG4 (432), HEO, VEO (371), VEOG, HEOG (202), EXG2–EXG6: non-scalp channels. Three datasets lose scalp electrodes the bank does not know and the dataset does not place: ds004356 (EP1, EP2; 5.9 % of its channel-hours, other channels included), ds005697 (CB1, CB2; 5.4 %), ds004279 (CB1, CB2; 3.1 %). The per-dataset effects are tabulated at the end of this card.

Layout

path in the repository content
README.md this card, including the change notice
LICENSES.csv one row per dataset: ids, name, licence and its URL, paradigm, authors, source DOI or URL, archive, hours, subjects, buckets
CITATION.bib the corpus and the 77 datasets, keyed by dataset id
eegdash-corpus-v0-buckets.csv one row per bucket: bucket, dataset, shard, n_samples, n_sessions, n_chans
eegdash-corpus-v0-manifest.csv one row per session: source file (BIDS path), bucket, channels, duration, native rate, channels dropped, subject, session, run, task
eegdash-corpus-v0-SHA256SUMS SHA-256 of every file of the store
eegdash-corpus-v0.zarr/ the store (Zarr v3)

The store: one group per bucket, named 0 … 631.

array shape dtype content
<b>/data (samples, 2000, channels) float32 the 10-s samples, Β΅V; one chunk per sample, 128 samples per shard file, Blosc-zstd level 5
<b>/session (samples,) int32 the session (row of stats, entry of sessions) each sample comes from
<b>/stats (sessions, 2, channels) float32 per-session mean and SD per channel, Β΅V
<b>/positions (channels, 3) float32 electrode positions, metres (MNE head frame)
attributes of keys
the root format: "reve-samples", version, sfreq: 200, window: 2000, units: "uV", band_pass_hz: [0.5, 99.5], datasets, n_buckets, n_samples, buckets (the bucket index), licence, licences, licence_file
a bucket dataset, channels (names, sorted), sessions (per session: source file, duration in samples at 200 Hz, n_samples, first_sample), bucket, source_shard, licence, licence_url, source

Loading

Access needs a Hugging Face account that has accepted the terms, and a token (hf auth login).

hf download EEGDash/eegdash-corpus-v0 --repo-type dataset --local-dir eegdash-corpus-v0          # everything, 3.6 TB
hf download EEGDash/eegdash-corpus-v0 --repo-type dataset --local-dir eegdash-corpus-v0 \
    --include "eegdash-corpus-v0.zarr/zarr.json" "eegdash-corpus-v0.zarr/0/**"                    # the root and bucket 0
import numpy as np
import zarr  # zarr >= 3

root = zarr.open_group("eegdash-corpus-v0/eegdash-corpus-v0.zarr", mode="r")
print(root.attrs["n_samples"], root.attrs["licences"]["ds004395"])        # 5045111 CC0-1.0

b = root["0"]
print(b.attrs["dataset"], b.attrs["licence"], b.attrs["source"], len(b.attrs["channels"]))
x = b["data"][0]                            # (2000, C) float32, Β΅V: one 10-s sample
mean, sd = b["stats"][int(b["session"][0])] # its session's per-channel mean and SD
z = np.clip((x - mean) / sd, -15, 15)       # REVE's normalisation, applied at load
pos = b["positions"][:]                     # (C, 3), metres

# the permissive subset (CC0, CC BY, CC BY-SA), from the root's index without opening each bucket
permissive = {"CC0-1.0", "CC-BY-4.0", "CC-BY-SA-4.0"}
keep = [str(r["bucket"]) for r in root.attrs["buckets"] if root.attrs["licences"][r["dataset"]] in permissive]

Held out

The corpus is meant to pretrain models that are then evaluated on OpenEEGBench, so the benchmark's sources were kept out of it. Of the eight public tasks, seven come from datasets EEGDash serves and were never in the corpus; the conversion refused them by id. ISRUC is not in EEGDash's catalogue.

task classes what it tests source nearest paradigm in the corpus
BCIC-IV-2a 4 motor imagery nm000139 BCI (MI & P300)
PhysioNet-MI 4 motor imagery ds004362 BCI (MI & P300)
BCIC-2020-3 5 imagined speech nm000113 auditory & language (Arabic inner speech)
Mumtaz 2 depression vs control, resting EEG nm000114 resting & consciousness; clinical routine EEG
Zyma 2 mental arithmetic load nm000109 memory & cognition
FACED 9 emotion while watching video clips nm000112 perception & emotion
CHB-MIT 2 seizure detection, paediatric scalp EEG nm000110 seizure (adult, Siena); development (children, no seizures)
ISRUC 5 sleep staging not in EEGDash none: the corpus holds no sleep recordings

Integrity

eegdash-corpus-v0-SHA256SUMS holds the SHA-256 of every file of the store (44,801 lines, sha256sum format, paths relative to the repository root). From the root of a full download:

sha256sum -c eegdash-corpus-v0-SHA256SUMS

The file's own SHA-256 is 0cba6a7b2106d8f9853c04d07f647256c32aa0c51ae4f8bc0953eaa882e32e54, at repository revision v1.0.

Citation

Cite the corpus:

@inproceedings{eegdash_corpus_v0,
  title     = {{EEGDash Corpus}: A Training-Ready Public Corpus for {EEG} Foundation Models},
  author    = {Shahi, Kuber and Aristimunha, Bruno and Delorme, Arnaud},
  booktitle = {7th International Workshop on Machine Learning for EEG Signal Processing (MLESP 2026), with IEEE BIBM 2026},
  year      = {2026}
}

and every dataset you use: CITATION.bib has one entry per dataset, keyed by its id (ds…, nm…), plus REVE, whose recipe the corpus follows.

Per dataset

Paradigm, sessions kept, native rates, channels kept, EEG-typed channels dropped for lack of a position, and sessions with channels placed from electrodes.tsv (from eegdash-corpus-v0-manifest.csv).

dataset short name paradigm licence sessions native rate (Hz) channels kept EEG-typed channels dropped per session (mean) sessions with channels placed from electrodes.tsv
ds001787 Meditation resting & consciousness CC0-1.0 40 256 64 0.0 0
ds002680 Go/no-go perception & emotion CC0-1.0 350 1,000 31 0.0 350
ds002721 Affective music perception & emotion CC0-1.0 185 1,000 19 0.0 0
ds002778 Parkinson rest resting & consciousness CC0-1.0 46 512 32 8.0 0
ds003004 Imagined emotion perception & emotion CC0-1.0 34 256 134–229 4.8 0
ds003690 Rest & auditory resting & consciousness CC0-1.0 375 500 61 3.9 375
ds003775 SRM rest resting & consciousness CC0-1.0 152 1,024 64 0.0 0
ds003825 THINGS-EEG1 perception & emotion CC0-1.0 50 1,000 63–123 0.2 0
ds003846 Prediction error learning & reward CC0-1.0 50 500 63 0.0 0
ds003885 Object motion 1 perception & emotion CC0-1.0 24 1,000 123 4.0 0
ds003887 Object motion 2 perception & emotion CC0-1.0 24 1,000 123 4.0 0
ds003969 Meditation vs think resting & consciousness CC0-1.0 392 1,024, 2,048 64 0.0 0
ds004043 Feature attention perception & emotion CC0-1.0 20 1,000 63 0.0 0
ds004147 Task value learning & reward CC0-1.0 12 1,000 31 0.0 0
ds004148 Test-retest rest resting & consciousness CC0-1.0 900 500 61 0.0 0
ds004152 Drum trainer learning & reward CC0-1.0 21 1,000 31 0.0 0
ds004262 Feedback learning & reward CC0-1.0 21 1,000 31 0.0 0
ds004264 Steer the ship learning & reward CC0-1.0 21 1,000 31 0.0 0
ds004279 Spanish sentences auditory & language CC0-1.0 60 1,000 62 2.0 0
ds004284 Neuroforecasting learning & reward CC0-1.0 18 1,000 129 0.0 0
ds004315 Mood induction perception & emotion CC0-1.0 50 500 59–63 6.4 0
ds004324 Toon faces perception & emotion CC0-1.0 26 500 28 0.0 0
ds004356 Music vs speech auditory & language CC0-1.0 24 10,000 32 2.0 0
ds004357 Features-EEG perception & emotion CC0-1.0 16 1,000 123 4.0 0
ds004395 PEERS memory & cognition CC0-1.0 6,480 250, 500, 512, 1,000, 1,024, 2,048 125–256 0.1 0
ds004408 Natural speech auditory & language CC0-1.0 380 512 128 0.0 0
ds004477 Pandemic scenario learning & reward CC0-1.0 9 2,048 64 15.0 0
ds004561 Agency illusion learning & reward CC0-1.0 23 10,000 62 0.0 0
ds004572 Hypnosis resting & consciousness CC0-1.0 516 1,000 58 0.0 0
ds004582 Fake faces perception & emotion CC0-1.0 73 10,000 59 0.0 0
ds004603 Context trajectory perception & emotion CC0-1.0 37 1,024 64 0.0 0
ds004706 Spatial memory memory & cognition CC0-1.0 297 2,048 128 0.0 0
ds004816 RSVP attention 1 perception & emotion CC0-1.0 20 1,000 63 0.0 0
ds004817 RSVP attention 2 perception & emotion CC0-1.0 20 1,000 63 0.0 0
ds004840 Music therapy auditory & language CC0-1.0 51 256, 512, 1,024 8 1.8 0
ds004902 Sleep deprivation resting & consciousness CC0-1.0 218 500, 5,000 61 0.0 0
ds004951 Braille letters learning & reward CC0-1.0 23 1,000 63 0.0 0
ds005089 Selective attention perception & emotion CC0-1.0 33 1,000 63 0.0 0
ds005095 Sternberg memory & cognition CC0-1.0 48 1,000 63 0.0 0
ds005121 Task not stated memory & cognition CC0-1.0 39 512 58 0.0 0
ds005189 Recollection memory & cognition CC0-1.0 30 1,000 62 0.0 0
ds005262 Arabic inner speech auditory & language CC0-1.0 186 250 8 0.0 0
ds005273 Seen vs unseen perception & emotion CC0-1.0 32 1,000 61 2.0 0
ds005505 HBN R1 development (rest & tasks) CC-BY-SA-4.0 1,342 500 129 0.0 0
ds005506 HBN R2 development (rest & tasks) CC-BY-SA-4.0 1,404 500 129 0.0 0
ds005507 HBN R3 development (rest & tasks) CC-BY-SA-4.0 1,812 500 129 0.0 0
ds005508 HBN R4 development (rest & tasks) CC-BY-SA-4.0 3,342 500 129 0.0 0
ds005509 HBN R5 development (rest & tasks) CC-BY-SA-4.0 3,324 500 129 0.0 0
ds005510 HBN R6 development (rest & tasks) CC-BY-SA-4.0 1,227 500 129 0.0 0
ds005511 HBN R7 development (rest & tasks) CC-BY-SA-4.0 3,098 500 6–129 0.0 0
ds005512 HBN R8 development (rest & tasks) CC-BY-SA-4.0 2,318 500 129 0.0 0
ds005514 HBN R9 development (rest & tasks) CC-BY-SA-4.0 2,881 500 129 0.0 0
ds005586 Numerosity perception & emotion CC0-1.0 23 1,000 60 0.0 0
ds005594 Alphabetic decision perception & emotion CC0-1.0 16 1,000 64 0.0 0
ds005620 Anaesthesia resting & consciousness CC0-1.0 202 5,000 62 2.3 0
ds005697 Perceive/imagine perception & emotion CC0-1.0 45 1,000 62 3.5 0
nm000123 Kalunga2016 SSVEP CC-BY-4.0 30 256 8 0.0 0
nm000138 AlexMI BCI (MI & P300) CC-BY-SA-4.0 8 512 16 0.0 0
nm000146 Weibo2014 BCI (MI & P300) CC0-1.0 10 200 60 0.0 0
nm000158 Liu2024 (stroke) BCI (MI & P300) CC-BY-4.0 100 500 29–30 1.5 0
nm000172 Schirrmeister2017 BCI (MI & P300) CC-BY-4.0 28 500 128 0.0 0
nm000173 Ofner2017 BCI (MI & P300) CC-BY-4.0 300 512 61 0.0 0
nm000181 NMT clinical routine EEG CC-BY-SA-4.0 2,413 200 21 0.0 0
nm000215 BI2014b BCI (MI & P300) CC-BY-4.0 38 512 32 0.0 0
nm000216 BI2015a BCI (MI & P300) CC-BY-4.0 129 512 32 0.0 0
nm000217 BI2015b BCI (MI & P300) CC-BY-4.0 176 512 32 0.0 0
nm000232 THINGS-EEG2 perception & emotion CC-BY-4.0 319 1,000 63 0.0 0
nm000238 SparrKULee auditory & language CC-BY-NC-4.0 659 1,024 64 0.0 0
nm000244 BI2014a BCI (MI & P300) CC-BY-4.0 64 512 16 0.0 0
nm000245 Cho2017 BCI (MI & P300) CC0-1.0 52 512 64 0.0 0
nm000250 Dreyer2023 BCI (MI & P300) CC-BY-4.0 1,040 512 27 0.0 0
nm000266 Sosulski2019 BCI (MI & P300) CC-BY-SA-4.0 2,120 1,000 31 3.0 0
nm000267 Shin2017A BCI (MI & P300) GPL-3.0 174 200 30 0.0 0
nm000273 Lee2019SSVEP SSVEP CC0-1.0 108 1,000 62 0.0 0
nm000323 Lee2019ERP BCI (MI & P300) CC0-1.0 432 1,000 62 2.0 0
nm000338 Lee2019-MI BCI (MI & P300) CC0-1.0 432 1,000 62 2.0 0
nm000385 Siena seizure CC-BY-4.0 41 512 29–31 0.0 0
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