Probably a topological defect but we would need the data to tell. Feel free to 
ftp it to us and we will take a look
Cheers
Bruce

> On Feb 8, 2018, at 12:19 PM, Emily Schwartz <emily.schwa...@einstein.yu.edu> 
> wrote:
> 
> Hi FreeSurfer community,
> 
> I am relatively new to manually editing and am having some questions dealing 
> with editing the wm.mgz. Occasionally, white matter and grey matter are being 
> incorrectly cut out, but I cannot edit WM voxels in the area (lh postcentral) 
> because they are already considered WM in the heat map (but excluded from the 
> boundary). I have attached images. How would I go about fixing this? Would 
> control points work here?
> 
> And would the segmentation error in slices 79-81(lh postcentral) be edited by 
> adding wm voxels (I can't really add any to slice 79)?
> 
> (This is an elderly brain.)
> 
> Thank you,
> 
> Emily
> 
> 
> <slice79_wm.png>
> <slice80_wm.png>
> <slice81_wm.png>
> <slice82_wm.png>
> <slice83_bm.png>
> <slice83_wm.png>
> <slice84_bm.png>
> <slice84_wm.png>
> <slice85_wm.png>
> <sliceax83_wm.png>
> <sliceax84_wm.png>
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