I think I figured it out but I want to double check. I am generating group-average map for my subjects using isxconcat-sess command which generates ces maps for each time frame. I think these maps are what I wanted. Right? If you still have other solutions that you think may generate more reliable results, I am eager to know. For instance, is there anyway to fit a model as we do for spmhrf or fslhrf, but just for the negative peak?
Regards
That's the problem Doug. I have already generated the FIR model but how can I show the sig MAP for one "particulat time point". What are the other ways?
On Wed, Apr 10, 2013 at 4:05 PM, Douglas N Greve greve@nmr.mgh.harvard.eduwrote:
Hi Shahin, there are several ways that you could do it. The one that immediately comes to mind is to use an FIR and then test for a difference at a particular post stimulus time point. doug
On 04/10/2013 03:54 PM, SHAHIN NASR wrote:
Hi, I want to generate a map to show the significant difference between HRF undershoot (negative peak of activity) between two conditions independent from the positive peak. Is there anyway, to generate this map?
P.S.: Please note that I need a map and not a time course graph.
-- Shahin Nasr
PhD in Cognitive Neuroscience Martinos Imaging Center, MGH Harvard Medical School
-- Douglas N. Greve, Ph.D. MGH-NMR Center greve@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422
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-- Shahin Nasr
PhD in Cognitive Neuroscience Martinos Imaging Center, MGH Harvard Medical School
-- Shahin Nasr
PhD in Cognitive Neuroscience Martinos Imaging Center, MGH Harvard Medical School _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer