I am working with creating a surface parcellation from a volumetric parcellation and have some questions as follows:

1. If the volumetric parcellation is a labeled 4D multi-frame dataset, could I still use the mris_sample_parc? Or could mri_vol2surf get the sampled labels for every vertex?

2. For the 4D multi-frame dataset and mri_vol2surf output results, which GUI should I use to visualize it? I tried freeview for 4D multi-frame dataset but it looks weird.

3. Is there any command to separate multi-frame volume to single frame volumes? 

Many thanks!

Best,

An