nm000225 NEMAR-native dataset

PhysioNet 2018 Challenge: Sleep Arousal Detection PSG (Training)

This dataset contains 1,983 overnight polysomnography recordings from patients at the Massachusetts General Hospital sleep laboratory, most of whom were evaluated for suspected sleep disorders such as obstructive sleep apnea. It was created for the PhysioNet/Computing in Cardiology Challenge 2018 on automatic detection of sleep arousals. The training set (994 subjects) includes expert annotations of sleep stages, respiratory events and arousals, while the test set (989 subjects) contains signals only. Recordings comprise EEG, EOG, EMG, respiratory effort, airflow, SpO2 and ECG channels sampled at 200 Hz.

EEG
Issues GitHub

Download this dataset

Pick a method. Large datasets skip the zip and use the streaming methods below — all resumable. Full download guide →

  1. NEMAR CLI recommended

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

    nemar dataset download nm000225
  2. DataLad

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

    datalad clone https://github.com/nemarDatasets/nm000225 nm000225
cd nm000225 && datalad get .
  3. git-annex

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

    git clone https://github.com/nemarDatasets/nm000225 nm000225
cd nm000225 && git annex get .
  4. Direct files (wget / curl / rclone)

    Every file with a stable, range-resumable URL from the manifest. Needs curl, jq, wget (or rclone/aria2c). Docs → 

    curl -s https://data.nemar.org/nm000225/v1.1.0/manifest.json | jq -r '.[].bytes_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/nm000225), 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 nm000225
cd nm000225 && nemar dataset get
  3. Just the files.

    rclone, aria2c, or any HTTPS client works against data.nemar.org/nm000225/ — the manifest carries presigned S3 URLs.

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

    Loading demographics…

    Files

    Loading file index…

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

    What it is

    Modalities
    EEG
    Participants
    1983
    Size
    401 GB
    Tasks
    sleep

    License and terms

    License
    Open Data Commons Attribution License v1.0
    Recommended citation
    Ghassemi, M. M., Moody, B. E., Lehman, L. H., Song, C., Li, Q., Sun, H., Mark, R. G., Westover, M. B., & Clifford, G. D. (2026). PhysioNet 2018 Challenge: Sleep Arousal Detection PSG (Training) (Version v1.1.0) [Data set]. NEMAR. https://doi.org/10.82901/nemar.nm000225
    Reference 1
    https://doi.org/10.21105/joss.01896
    Reference 2
    https://doi.org/10.1038/s41597-019-0104-8

    Where the bytes are

    Latest version (always current)
    https://data.nemar.org/nm000225/latest/
    This version (v1.1.0)
    https://data.nemar.org/nm000225/v1.1.0/

    How to download

    The dataset
    nemar dataset download nm000225 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 nm000225 --subjects sub-01,02 Also filters by --sessions, --tasks, --runs, --datatypes, --include and --exclude.
    A subset, step 1
    nemar dataset clone nm000225 Clones git-annex pointers only; fetches no file content. Creates ./nm000225.
    A subset, step 2
    cd nm000225 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/nm000225/v1.1.0/participants.tsv A direct HTTPS fetch works for any single file.

    Assess fit without downloading

    Participants table
    https://data.nemar.org/nm000225/v1.1.0/participants.tsv
    Dataset description
    https://data.nemar.org/nm000225/v1.1.0/dataset_description.json
    Directory listing
    https://data.nemar.org/nm000225/v1.1.0/?format=json
    Catalog record
    https://api.nemar.org/datasets/nm000225