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January 17, 2019 02:55PM
Could be a number of things. I'll say that it's not THAT unusual to have activation outside of the brain. SPM tends to mask this by default. They also used to mask the cerebellum, not sure if that's ever changed. When you adjust the threshold slider to a suitable p-value, do you still see activation in areas that you would expect? Have you tried to plot the activity of a particular voxel in activated areas against the ideal or design?

It looks like your afni_proc.py has options that are usually more recommended for resting state processing (e.g. despike, motion derivatives), and less so in processing of task-based designs. You might take a look at example 6 in the afni_proc.py help as a guideline.

Perhaps post some photos of thresholded maps vs. the SPM? A copy of your X.jpg would also be useful.

-PM
Subject Author Posted

Issue with stats in afni_proc.py Attachments

wilxl8 January 17, 2019 02:48PM

Re: Issue with stats in afni_proc.py

Peter Molfese January 17, 2019 02:55PM

Re: Issue with stats in afni_proc.py

rick reynolds January 17, 2019 05:03PM

Re: Issue with stats in afni_proc.py

ptaylor January 17, 2019 06:13PM

Re: Issue with stats in afni_proc.py

wilxl8 January 18, 2019 11:42AM

Re: Issue with stats in afni_proc.py

ptaylor January 18, 2019 01:41PM

Re: Issue with stats in afni_proc.py

wilxl8 January 18, 2019 04:26PM

Re: Issue with stats in afni_proc.py

ptaylor January 18, 2019 05:20PM

Re: Issue with stats in afni_proc.py

Peter Molfese January 18, 2019 08:08PM



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