EEGManySteps-Data-Curation

Data curation repository for EEGManySteps

This repository contains helpful resources for curating data sets collected for EEGManySteps.

It will contain the following :

1. Guideline to curating your data for submitting to EEGManySteps
2. Metadata from individual contributions, including link to the data repository as needed.
3. Scripts for converting individual submissions to a standardized format (BIDS + custom metadata)
4. Template and utility scripts for checking metadata integrity and conversion

Overview of submitted data sets

Dataset ID	Contributor	Source EEG Format	Source Motion Format	Link to data set	Status
ds_A1_TB	Tjeerd Boonstra	.	.	available upon request	curation in progress
ds_B1_LSIE	Grant Hanada/Daniel Ferris	.set	.mat	figshare	curation in progress
ds_B2_UK	Sodiq Fakorede/Hannes Devos	.xdf	.xdf	in preparation	curation in progress
ds_B3_HIP	Anna Wunderlich/Klaus Gramann	.	.	in preparation	curation in progress

Metadata guideline for contributors (WIP...)

Contributors are recommended to follow the terminology prescribed by Motion-BIDS. Especially, the metadata for each channel should contain information specified for the ‘_channels.tsv’ file. We provide template ManySteps metadata files and a validator script to help you check the integrity of your data set for joint analysis of EEG and gait.

Following are the steps on how to check for metadata for your data set:

Device

If a system records motion from various parts on the body but is processed with the same device (e.g. Vicon), this device meta data is to be entered in the *_motion.json file.

Channels

For each device all channels and their metadata should be specified in a separate channels.tsv file. Please check the BIDS specification how to do this.

Sensor placement

BIDS-Motion currently does not restrict keywords for body parts for sensor placement. These keywords are entered into column ‘placement’ of ‘*_channels.tsv’ file. The coordinates are defined according to the human sensor placement system proposed in this document.

Name	Exemplar coordinates (X,Y,Z)
Head	50,50,100
LowerBack	50,50,100
LeftFoot	50,70,30
RightFoot	50,70,30

Pre-extracted gait data

If the system you recorded data with do not provide raw time series data, gait events can be optionally shared in ‘*_events.tsv’ file accompanying EEG or motion data. These keywords are entered into column ‘’.

Keyword	Description
Head	50,50,100
LowerBack	50,50,100
LeftFoot	50,70,30
RightFoot	50,70,30

Reference frame and spatial axis definition

Local or global reference frame

Time synchronisation between motion.tsv and EEG

Please use ‘acq’ column in the ‘*_scans.tsv’ file for aligning the onsets of different data streams. In case the sampling rate is irregular, please also provide information about sample-by-sample latency as data channel concatenated with the motion data. This channel should have type ‘latency’, expressed as seconds from the onset of the corresponding motion.tsv file. In case you use TTL-based synchronisation,