The unsegmented is all the WM that is further than 5mm from cortex. You can change the threshold so that it labels all of WM regardless of the distance. Other than that, I don't have much to suggest.
doug

On 11/18/14 6:13 PM, Michele Cavallari wrote:

Hi, I am planning to perform some regional analysis of the frontal white matter as a whole, and asking here for suggestions/help.
From the FS output wmparc.mgz I could select and merge the following labels to define my ROI

parsorbitalis [4019, 3019]

parstriangularis [4020, 3020]

lateralorbitofrontal [4012, 3012]

medialorbitofrontal [4014, 3014]

rostralmiddlefrontal [4027, 3027]

frontalpole [4032, 3032]

superiofrontal [4028, 3028]

caudalmiddlefrontal [4003, 3003]

paracentral [4017, 3017]

parsopercularis [4018, 3018]

postcentral [4022, 3022]

precentral [4024, 3024]

rostralantcingulate [4026, 3026]

However, a non-negligible portion of the subcortical frontal WM is classified as unsegmented WM [5001, 5002] by FS. Would you recommend any other FS output or template/atlas that I could use for the purpose of measuring MRI signal in the frontal WM?

Thanks
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