[![DOI](https://img.shields.io/badge/DOI-10.82901%2Fnemar.on003633-blue)](https://doi.org/10.82901/nemar.on003633)


**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. 


**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, liuxingyu987@foxmail.com).


**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