> I have two populations that have no statistical difference in total brain
> volume. When I'm doing VBM analysis, I get significant difference in gray
> matter in some regions. Does this mean that I should expect increase in
> csf or white ?
Not necessarily. Some grey matter regions may increase in volume, whereas
others may decrease. It's possible that decreases may be detected in some
region, but that increases may not - or vica verca. This will depend on the
amount of residual variance in each region.
Best regards,
-John
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