nm000412 NEMAR-native dataset

ECoG hemispheric asymmetry during reaching (Merrick et al. 2022): authors' 1000 Hz intracranial exports with reach kinematics

Intracranial electrocorticography (ECoG) recordings from six patients with intractable epilepsy implanted with subdural grids, three in the left hemisphere and three in the right. Patients performed an instructed-delay reaching task on a touchscreen with each arm, and the dataset provides 1000 Hz neural exports together with reach kinematics. It is a BIDS re-packaging of the authors' public release, built to study hemispheric asymmetry in the encoding of bilateral arm kinematics.

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) — 12.7 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 nm000412
  3. DataLad

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

    datalad clone https://github.com/nemarDatasets/nm000412 nm000412
cd nm000412 && datalad get .
  4. git-annex

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

    git clone https://github.com/nemarDatasets/nm000412 nm000412
cd nm000412 && 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/nm000412/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/nm000412), 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 nm000412
cd nm000412 && nemar dataset get
  3. Just the files.

    rclone, aria2c, or any HTTPS client works against data.nemar.org/nm000412/ — 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
    6
    Size
    12.1 GB
    Tasks
    reach

    License and terms

    License
    CC-BY-4.0
    Recommended citation
    Merrick, C. M., Dixon, T. C., Breska, A., Lin, J. J., Chang, E. F., King-Stephens, D., Laxer, K. D., Weber, P. B., Carmena, J. M., Knight, R. T., & Ivry, R. B. (2026). ECoG hemispheric asymmetry during reaching (Merrick et al. 2022): authors' 1000 Hz intracranial exports with reach kinematics (Version v1.0.0) [Data set]. NEMAR. https://doi.org/10.82901/nemar.nm000412

    Where the bytes are

    Latest version (always current)
    https://data.nemar.org/nm000412/latest/
    This version (v1.0.0)
    https://data.nemar.org/nm000412/v1.0.0/

    How to download

    The dataset
    nemar dataset download nm000412 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 nm000412 --subjects sub-01,02 Also filters by --sessions, --tasks, --runs, --datatypes, --include and --exclude.
    A subset, step 1
    nemar dataset clone nm000412 Clones git-annex pointers only; fetches no file content. Creates ./nm000412.
    A subset, step 2
    cd nm000412 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/nm000412/v1.0.0/participants.tsv A direct HTTPS fetch works for any single file.

    Assess fit without downloading

    Participants table
    https://data.nemar.org/nm000412/v1.0.0/participants.tsv
    Dataset description
    https://data.nemar.org/nm000412/v1.0.0/dataset_description.json
    Directory listing
    https://data.nemar.org/nm000412/v1.0.0/?format=json
    Catalog record
    https://api.nemar.org/datasets/nm000412