Look like you want to do a ROI analysis. I suggest you to take a look at Marsbar. You can find out the voxel number inside certain region above certain threshold. But I am afraid that you have to do a lot of custom programs to get what you want.
On Oct 16, 2012, at 3:03 PM, Peter Papp <[log in to unmask]> wrote:
> Hi Guys,
>
> as a PhD student seriously interested but newbie in neuroimaging, I'd like to ask for your help in a matter I have difficulties in tackling. I am using SPM5 to analyze fMRI data and found activation locii in the anterior cingulate cortex, ACC. In order to test an assumption, that neural activation in the ACC may potentially reflect a state of psychological conflict, I'm planning on carrying out a correlation analysis between reaction times (logged during scanning) and the extent of ACC activation. So, to make things straight, I am seeking to discover a positive connection between button-press reaction time and the neural activation of the anterior cingulate, expressed in number of voxels.
>
> Could you please lend me a hand in finding out how to start arranging this using SPM5? Is it even possible to conduct such analyses using strictly this piece of software? What would be the to-dos on the individual and the group level of analysis?
>
> Thanks so much for any help - it will be greatly appreciated!
>
> With best regards, and wishing you all a nice day,
>
> P¨¦ter
>
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