I was looking at the results of my data when I found that there were some black spots in my parcellation results (Please see the attached screenshot, the black spots were indicated by arrows).

 

I did not see any hole or other errors in the surfaces generated for this subject. I hope you can help me with why the black spots were there? is it a big deal or something that I can ignore? If they need to be fixed, what should I do? Thanks! 

I am sorry if this question has been posted here. I really tried to find the answer by myself but I did not find anything.

Thanks,

Yang