DS002312: meg dataset, 19 subjects#

OcularLDT

Access recordings and metadata through EEGDash.

Citation: Teon L Brooks, Laura Gwilliams, Alexandre Gramfort, Alec Marantz (2019). OcularLDT. 10.18112/openneuro.ds002312.v1.0.0

Modality: meg Subjects: 19 Recordings: 23 License: CC0 Source: openneuro

Metadata: Complete (90%)

Quickstart#

Get Started

Install

pip install eegdash

Access the data

from eegdash.dataset import DS002312

dataset = DS002312(cache_dir="./data")
# Get the raw object of the first recording
raw = dataset.datasets[0].raw
print(raw.info)

Query & Filter

Filter by subject

dataset = DS002312(cache_dir="./data", subject="01")

Advanced query

dataset = DS002312(
    cache_dir="./data",
    query={"subject": {"$in": ["01", "02"]}},
)

Iterate recordings

for rec in dataset:
    print(rec.subject, rec.raw.info['sfreq'])

Cite This Dataset

If you use this dataset in your research, please cite the original authors.

BibTeX

@dataset{ds002312,
  title = {OcularLDT},
  author = {Teon L Brooks and Laura Gwilliams and Alexandre Gramfort and Alec Marantz},
  doi = {10.18112/openneuro.ds002312.v1.0.0},
  url = {https://doi.org/10.18112/openneuro.ds002312.v1.0.0},
}

About This Dataset#

No README content is available for this dataset.

Dataset Information#

Dataset ID	`DS002312`
Title	OcularLDT
Author (year)	`Brooks2019`
Canonical	—
Importable as	`DS002312`, `Brooks2019`
Year	2019
Authors	Teon L Brooks, Laura Gwilliams, Alexandre Gramfort, Alec Marantz
License	CC0
Citation / DOI	10.18112/openneuro.ds002312.v1.0.0
Source links	OpenNeuro \| NeMAR \| Source URL

Found an issue with this dataset?

If you encounter any problems with this dataset (missing files, incorrect metadata, loading errors, etc.), please let us know!

Report an Issue on GitHub

Technical Details#

Subjects & recordings

Subjects: 19
Recordings: 23
Tasks: 1

Channels & sampling rate

Channels: 257
Sampling rate (Hz): 1000.0
Duration (hours): 7.096010277777777

Electrode Layout#

Electrode layout — MEG · 208 sensors — 208 channels

Dataset Statistics#

Channel counts: 257 ch (n=23 recordings)

Sampling frequencies: 1000.0 Hz (n=15 recordings)

Total recording duration: 7 h 5 min

NEMAR Processing Statistics#

The plots below are generated by NEMAR’s automated EEG pipeline. The histogram shows pipeline success for data cleaning and ICA decomposition, the percentage of data frames and EEG channels retained after artefact removal, line noise per channel (RMS, dB), and the age/gender distribution of participants.

HED event descriptors word cloud

Signal Preview#

Live trace viewer — sub-A0134 · task-OcularLDT

Showing one representative recording out of 19 subjects and 23 recordings in this dataset. Browse the full set on OpenNeuro; drop any other _meg.{set,edf,bdf,vhdr} file onto the viewer (or pass ?meg=<url>) to inspect it.

File Explorer#

Browse the BIDS file structure of this dataset. Records are fetched on demand from the EEGDash catalog the first time you open the explorer.

Files: —

Size: —

Subjects: —

Click to load file structure…

API Reference#

Use the DS002312 class to access this dataset programmatically.

class eegdash.dataset.DS002312(cache_dir: str, query: dict | None = None, s3_bucket: str | None = None, **kwargs)[source]#

Bases: EEGDashDataset

OcularLDT

Study:: ds002312 (OpenNeuro)
Author (year):: Brooks2019
Canonical:: —

Also importable as: DS002312, Brooks2019.

Modality: meg; Experiment type: Perception; Subject type: Healthy. Subjects: 19; recordings: 23; tasks: 1.

Parameters:

cache_dir (str | Path) – Directory where data are cached locally.
query (dict | None) – Additional MongoDB-style filters to AND with the dataset selection. Must not contain the key dataset.
s3_bucket (str | None) – Base S3 bucket used to locate the data.
**kwargs (dict) – Additional keyword arguments forwarded to EEGDashDataset.

data_dir#

Local dataset cache directory (cache_dir / dataset_id).

Type:: Path

query#

Merged query with the dataset filter applied.

Type:: dict

records#

Metadata records used to build the dataset, if pre-fetched.

Type:: list[dict] | None

Notes

Each item is a recording; recording-level metadata are available via dataset.description. query supports MongoDB-style filters on fields in ALLOWED_QUERY_FIELDS and is combined with the dataset filter. Dataset-specific caveats are not provided in the summary metadata.

References

OpenNeuro dataset: https://openneuro.org/datasets/ds002312 NeMAR dataset: https://nemar.org/dataexplorer/detail?dataset_id=ds002312 DOI: https://doi.org/10.18112/openneuro.ds002312.v1.0.0

Examples

>>> from eegdash.dataset import DS002312
>>> dataset = DS002312(cache_dir="./data")
>>> recording = dataset[0]
>>> raw = recording.load()

__init__(cache_dir: str, query: dict | None = None, s3_bucket: str | None = None, **kwargs)[source]#

save(path: str, overwrite: bool = False, offset: int = 0)[source]#

Save datasets to files by creating one subdirectory for each dataset:

path/
    0/
        0-raw.fif | 0-epo.fif
        description.json
        raw_preproc_kwargs.json (if raws were preprocessed)
        window_kwargs.json (if this is a windowed dataset)
        window_preproc_kwargs.json  (if windows were preprocessed)
        target_name.json (if target_name is not None and dataset is raw)
    1/
        1-raw.fif | 1-epo.fif
        description.json
        raw_preproc_kwargs.json (if raws were preprocessed)
        window_kwargs.json (if this is a windowed dataset)
        window_preproc_kwargs.json  (if windows were preprocessed)
        target_name.json (if target_name is not None and dataset is raw)