> now I am analyzing normal group (21 subjects, group1) and some epilepsy group
> (21 subjects, group 2) with VBM method, and found some significant difference of
> bray, white matter distribution. But I cannot catch the meaning which group has more
> large gray matter distribution in the glass brain. Does result mean lager gray matter
> distribution in normal group? In that case, how can I get the result of increased and
> decreased gray matter distribution in patients group?
I'm afraid I can't tell which group has more regional grey matter from the information
you sent. The contrast representing patients - controls will show you where there
is more grey matter in the patients. Controls - patients will show where there is
less grey matter in the patients.
Good luck,
-John
--
Dr John Ashburner.
Functional Imaging Lab., 12 Queen Square, London WC1N 3BG, UK.
tel: +44 (0)20 78337491 or +44 (0)20 78373611 x4381
fax: +44 (0)20 78131420 http://www.fil.ion.ucl.ac.uk/~john
|