Dataset: Feedback contribution to surface motion perception in the human early visual cortex

fMRI data are arrange by subject (following BIDS convention). For each subject, there are subfolders for anatomical and functional MRI data.

├── sub-01
│ ├── anat
│ │ └── ...
│ ├── func
│ │ └── ...
│ ├── func_se
│ │ └── ...
│ └── func_se_op
│ └── ...

The subfolder 'anat' contains four images from the MP2RAGE sequence (among these, T1 and proton-density weighted images). The subfolder 'func' contains the functional data (GE EPI, T2* weighted) from the main experiment (i.e. the data from which the haemodynamic response was estimated, and on which statistical analysis was performed). The subfolders 'func_se' and 'func_se_op' contain SE EPI images with opposite phase encode polarity that were used for distortion correction. Moreover, for each image/timeseries there is a json file with metadata.

Anatomical images have been masked anteriorly (defaced). Functional images are in coronal oblique orientation, covering early visual cortex.

The folder 'stimuli' contains information on the stimuli used for retinotopic mapping, including timecourse models used for population receptive field mapping. (These files are included here because of their relatively large file size, which would make distribution via a git repository impractical.) The software used for the presentation of retinotopic mapping stimuli (and for the corresponding analysis) is available on github.

For example videos of the main experimental stimuli, see zenodo.2583017. If you would like to reproduce the experimental stimuli, the respective PsychoPy code can be found on github.

The exact timing of events during the experiments (rest & stimulus blocks, target events) can be found in FSL-style design matrices ("3 column format") on github.com/ingo-m/PacMan/tree/master/analysis/FSL_MRI_Metadata.