Hi Alfonso,

I am defining a custom list of ROI based on a .txt file (which I renamed to a .tal file) which contains 3 columns with {x,y,z} coordinates in MNI space. There are 21 ROIs (hence 21 rows) in the .tal file.

My questions are:

- How can i define the size of each ROI? In other words, will conn use a single voxel as the ROI, or do I ave control about (e.g.) selecting a fixed-size region around each voxel defined by a row in the .tal file?

- How do I assign labels (i.e. names) to the 21 ROIs (does not look like these should go in the .tal file)?

- What is does the "Dimension" field relate to? Maybe my first poitn above?

Thank you very much in advance!

Nicola