ForrestGump-MEG

**ForrestGump-MEG: A audio-visual movie watching MEG dataset**

For details please refer to our paper on https://www.biorxiv.org/content/10.1101/2021.06.04.446837v1.

This dataset contains MEG data recorded from 11 subjects while watching the 2h long Chinese-dubbed audio-visual movie 'Forrest Gump'. The data were acquired with a 275-channel CTF MEG. Auxiliary data (T1w) as well as derivation data such as preprocessed data and MEG-MRI co-registration are also included.

Please noted that For sub-01, the MEG machine collapsed at the 500th second in run 7 (segment 7), a supplementary run (run 8, segment 7, 200 s) was recorded subsequently after the collapse. So there are 9 runs in total for sub-01 with run 7&8 for segment 7 and run 9 for segment 8.

**Pre-process procedure description**

The T1w images stored as NIFTI files were minimally-preprocessed using the anatomical preprocessing pipeline from fMRIPrep with default settings.

MEG data were pre-processed using MNE following a three-step procedure: 1. bad channels were detected and removed. 2. a high-pass filter of 1 Hz was applied to remove possible slow drifts from the continuous MEG data. 3. artifacts removal was performed with ICA.

**Stimulus material**

The audio-visual stimulus materials were from the Chinese-dubbed 'Forrest Gump' DVD released in 2013 (ISBN: 978-7-7991-3934-0), which cannot be publicly released due to copyright restrictions. The stimulus materials are available upon reasonable request and on condition of a research-only data use agreement (correspondence with Xingyu Liu, [e-mail]).

**Dataset content overview**

the data were organized following the MEG-BIDS using MNE-BIDS toolbox.

*the pre-processed MEG data*

The preprocessed MEG recordings including the preprocessed MEG data, the event files, the ICA decomposition and label files and the MEG-MRI coordinate transformation file are hosted here.

|---./derivatives/preproc_meg-mne_mri-fmriprep/sub-xx/ses-movie/meg/
|---sub-xx_ses-movie_coordsystem.json
|---sub-xx_ses-movie_task-movie_run-xx_channels.tsv
|---sub-xx_ses-movie_task-movie_run-xx_decomposition.tsv
|---sub-xx_ses-movie_task-movie_run-xx_events.tsv
|---sub-xx_ses-movie_task-movie_run-xx_ica.fif.gz
|---sub-xx_ses-movie_task-movie_run-xx_meg.fif
|---sub-xx_ses-movie_task-movie_run-xx_meg.json
|---...
|---sub-xx_ses-movie_task-movie_trans.fif

*the pre-processed MRI data*

The preprocessed MRI volume, reconstructed surface, and other associations including transformation files are hosted here

|---./derivatives/preproc_meg-mne_mri-fmriprep/sub-xx/ses-movie/anat/
|---sub-xx_ses-movie_desc-preproc_T1w.nii.gz
|---sub-xx_ses-movie_hemi-L_inflated.surf.gii
|---sub-xx_ses-movie_hemi-L_midthickness.surf.gii
|---sub-xx_ses-movie_hemi-L_pial.surf.gii
|---sub-xx_ses-movie_hemi-L_smoothwm.surf.gii
|---sub-xx_ses-movie_hemi-R_inflated.surf.gii
|---sub-xx_ses-movie_hemi-R_midthickness.surf.gii
|---sub-xx_ses-movie_hemi-R_pial.surf.gii
|---sub-xx_ses-movie_hemi-R_smoothwm.surf.gii
|---sub-xx_ses-movie_space-MNI152NLin2009cAsym_desc-preproc_T1w.nii.gz
|---sub-xx_ses-movie_space-MNI152NLin6Asym_desc-preproc_T1w.nii.gz
|---...

the FreeSurfer surface data, the high-resolution head surface and the MRI-fiducials are provided here

|---./derivatives/preproc_meg-mne_mri-fmriprep/sourcedata/
|---freesurfer
|---sub-xx
|---...

*the raw data*

|---./sub-xx/ses-movie/
|---meg/
| |---sub-xx_ses-movie_coordsystem.json
| |---sub-xx_ses-movie_task-movie_run-xx_channels.tsv
| |---sub-xx_ses-movie_task-movie_run-xx_events.tsv
| |---sub-xx_ses-movie_task-movie_run-xx_meg.ds
| |---sub-xx_ses-movie_task-movie_run-xx_meg.json
| |---...
|---anat/
|---sub-xx_ses-movie_T1w.json
|---sub-xx_ses-movie_T1w.nii.gz