Dear Freesurfer experts, I am running some functional connectivity analyses using FSFAST in Freesurfer 5.1. I would like to compare seed time courses (which I later use as predictors) obtained after regular pre-processing with seed time courses obtained after regressing out several nuisance parameters. I am a little bit unsure how to use the output from selxavg3-sess for the latter. After defining a single subject analysis with mkanalysis-sess with -notask and only the nuisanance regressors (-nuisreg), I currently run selxavg3-sess with -no-con-ok and -run-wise. Can I then take the time courses from the respective beta.nii per run? Or am I completely off here? Thanks! Caspar
hm, I just realized that I should probably run selxavg3-sess with -svres and then take the residuals from the res folder, right? caspar
2013/2/22 Caspar M. Schwiedrzik cschwiedrz@rockefeller.edu:
Dear Freesurfer experts, I am running some functional connectivity analyses using FSFAST in Freesurfer 5.1. I would like to compare seed time courses (which I later use as predictors) obtained after regular pre-processing with seed time courses obtained after regressing out several nuisance parameters. I am a little bit unsure how to use the output from selxavg3-sess for the latter. After defining a single subject analysis with mkanalysis-sess with -notask and only the nuisanance regressors (-nuisreg), I currently run selxavg3-sess with -no-con-ok and -run-wise. Can I then take the time courses from the respective beta.nii per run? Or am I completely off here? Thanks! Caspar
Hi Caspar, youcan do it that way and then extract the average time course from the residuals. Otherwise, you'd have to do the regression yourself in matlab. doug
On 02/22/2013 11:01 AM, Caspar M. Schwiedrzik wrote:
hm, I just realized that I should probably run selxavg3-sess with -svres and then take the residuals from the res folder, right? caspar
2013/2/22 Caspar M. Schwiedrzik cschwiedrz@rockefeller.edu:
Dear Freesurfer experts, I am running some functional connectivity analyses using FSFAST in Freesurfer 5.1. I would like to compare seed time courses (which I later use as predictors) obtained after regular pre-processing with seed time courses obtained after regressing out several nuisance parameters. I am a little bit unsure how to use the output from selxavg3-sess for the latter. After defining a single subject analysis with mkanalysis-sess with -notask and only the nuisanance regressors (-nuisreg), I currently run selxavg3-sess with -no-con-ok and -run-wise. Can I then take the time courses from the respective beta.nii per run? Or am I completely off here? Thanks! Caspar
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