Thanks Nick, my version is 4.0.3 on a linux 32bit. If you could send me the update I would be grateful. My point is to do a whitte matter comparison between two groups of subjects, with and without a pathology. I woul like to use white matter as I use cortical thickness (If it is possible), and not as a regressor. Thank tou for the help.
____________________________________________________________________________________ Veja quais são os assuntos do momento no Yahoo! +Buscados http://br.maisbuscados.yahoo.com