Hi, I wonder what exact coordinate system do surfaces fetched by nilearn.datasets.fetch_surf_fsaverage use? Is it ICBM 2009c Nonlinear Asymmetric template?

Hi @David1 , welcome to Neurostars! The coordinates of the vertices changes depending on what kind of surface you look at: paid, inflated, etc… Did I understand your question correctly? I found these ressources helpful: You might have noticed that I never mentioned where CIFTI files store the loc…

Thank you very much for the information! I am still wondering what I should do for this specific case: I have fMRI volumes in the MNI152NLin2009cAsym space, and want to use nilearn.surface.vol_to_surf with the surface “fsaverage5” to extract the cortical activations. But from my understanding, the…

I am not a user of nilearn.surface.vol_to_surf. What you could do would be to use a software such as fmriprep that can output you data in both volume and surface spaces.

Thanks. I will give it a try. But if there is anyone else who used nilearn.surface.vol_to_surf, I will appreciate any suggestions.

Here are two additional informative links for this question: [image] Which MNI brain is used for the fsaverage aseg? No MNI brain is used for fsaverage. It was developed in 1999 prior to the MNI 152 template in 2001, so it’s its own space. Many people who use…

Nilearn: the coordinate system of fsaverage surfaces

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jsein June 28, 2024, 8:07pm 6

Here are two additional informative links for this question: