nm000452 NEMAR-native dataset

ECoG_HB_02: hybrid-density ECoG high-gamma features with synchronised speech, one participant (derivative)

A derivative repackaging of the single-participant ECoG_HB_02 Mendeley Data deposit, comprising a processed 125 Hz high-gamma (70-150 Hz) envelope feature matrix from a hybrid-density ECoG grid with synchronised speech audio. The participant is the one individual from Chen et al. 2024 who consented to public release of neural and audio data. The data were converted to BrainVision format with channel and event sidecars for 372 word trials (51 distinct words); the raw ECoG voltage recordings were not released.

IEEG
Issues GitHub

Download this dataset

Pick a method. Large datasets skip the zip; resume support depends on each file's storage type. Full download guide →

  1. Download archive (.zip) — 1.1 GB

    A single zip of the published version. Best for small/medium datasets.

    Download zip

  2. NEMAR CLI recommended

    Pulls the pinned version + annexed data and resumes cleanly. Install nemar-cli → 

    nemar dataset download nm000452
  3. DataLad

    Clone the dataset repo and fetch file content on demand. Docs → 

    datalad clone https://github.com/nemarDatasets/nm000452 nm000452
cd nm000452 && datalad get .
  4. git-annex

    Plain git + git-annex against the dataset repo. Docs → 

    git clone https://github.com/nemarDatasets/nm000452 nm000452
cd nm000452 && git annex get .
  5. Direct files (wget / curl / rclone)

    Every file is listed by its stable manifest URL. Single-range requests and resume are currently supported for annex-backed entries; git-tracked files are served as full bodies. Real chunk-only byte delivery still awaits isolated, non-synthetic acceptance. Needs curl, jq, wget (or rclone/aria2c). Docs → 

    curl -s https://data.nemar.org/nm000452/v1.0.0/manifest.json | jq -r '.[].url' > urls.txt
wget -xc -i urls.txt

Compute on this dataset

Two routes today, with a third (in-browser one-click submission) landing soon.

  1. NeuroScience Gateway (NSG) portal.

    NSG runs EEGLAB / Brainstorm / MNE pipelines on supercomputing time donated by SDSC. Create an account, point a job at this dataset's S3 prefix (s3://nemar/nm000452), and submit.
    nsgportal.org →

  2. Local processing with nemar-cli.

    Pull the dataset to your machine and run any toolbox locally. Honors the published version pinning. 

    npm install -g nemar-cli
nemar dataset clone nm000452
cd nm000452 && nemar dataset get
  3. Just the files.

    rclone, aria2c, or any HTTPS client works against data.nemar.org/nm000452/ — the manifest carries stable data-plane file URLs. Single-range requests are supported for annex-backed entries; git-tracked files are served as full bodies. Real chunk-only byte delivery remains under isolated acceptance.

Direct compute access is coming soon. One-click NSG submission from this page is scoped for a follow-up phase. Tracked on nemarOrg/website#6.

Citations

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    Files

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    Signal viewer
    How to use the data (for agentic research) license, citation, download commands

    What it is

    Modalities
    IEEG
    Participants
    1
    Size
    1.24 GB
    Tasks
    speech

    License and terms

    License
    CC-BY-4.0
    Recommended citation
    Chen, X. (2026). ECoG_HB_02: hybrid-density ECoG high-gamma features with synchronised speech, one participant (derivative) (Version v1.0.0) [Data set]. NEMAR. https://doi.org/10.82901/nemar.nm000452
    Reference
    https://doi.org/10.5281/zenodo.10719428

    Where the bytes are

    Latest version (always current)
    https://data.nemar.org/nm000452/latest/
    This version (v1.0.0)
    https://data.nemar.org/nm000452/v1.0.0/

    How to download

    The dataset
    nemar dataset download nm000452 Clones and fetches in one step. Content under stimuli/ and derivatives/ is skipped by default because those trees can be large; add --stimuli --derivatives for the whole thing.
    A subset, one step
    nemar dataset download nm000452 --subjects sub-01,02 Also filters by --sessions, --tasks, --runs, --datatypes, --include and --exclude.
    A subset, step 1
    nemar dataset clone nm000452 Clones git-annex pointers only; fetches no file content. Creates ./nm000452.
    A subset, step 2
    cd nm000452 The get command below reads the clone's annex, so it only works from inside the clone.
    A subset, step 3
    nemar dataset get <files> Pulls the files you actually need. Skips stimuli/ and derivatives/ unless the path you ask for is under one of them.
    One small file
    https://data.nemar.org/nm000452/v1.0.0/participants.tsv A direct HTTPS fetch works for any single file.

    Assess fit without downloading

    Participants table
    https://data.nemar.org/nm000452/v1.0.0/participants.tsv
    Dataset description
    https://data.nemar.org/nm000452/v1.0.0/dataset_description.json
    Directory listing
    https://data.nemar.org/nm000452/v1.0.0/?format=json
    Catalog record
    https://api.nemar.org/datasets/nm000452