Hi Deborah
I have done exactly what you mention below, but I wrote custom matlab
functions to do this. I did not find a way to extract the actual timetrends
of clusters of activation using the standard SPM functions - although I
would be happy to be shown how. Once you get the timetrends, you have to be
careful in interpreting them, as the spm estimation may intensity normalize
or temporally filter the data (depending on the options you select), in
which case your timetrends would not refect the exact dependent variable in
the model. If you are familiar with matlab programming then I could show
you what I have written. If you are not familiar, then best look for some
way to get the data using the SPM results functions.
Cheers,
Paul
>Hi to all
>
>I am new to this list and to SPM. Thank-you in advance for your patience.
>We have some fMRI data ( both control and affected groups ). We have done a
>series of fMRI experiments on both groups using a visual stimulus which is
>on and off for a total of 2 minutes in a boxcar design. We would like to
>generate an average time course for each group and compare those average
>time courses to each other for each area of activatioin that we see/don't
>see. Is this possible in SPM? If so, how do I do this task? If anyone can
>point me in the right direction I would appreciate that.
>
>Thanks
>Deborah
Paul Macey
Deparment of Neurobiology
David Geffen School of Medicine at UCLA
10833 Le Conte Ave
Los Angeles, CA 90095-1763
email: [log in to unmask]
phone: +1-310-206-1679
fax: +1-310-825-2224
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