Thanks for your replies Doug!

1) Thanks.

2) Regarding question number 2, yes that was what I meant.

3) I ran the task analysis and extracted time series from unwhitened residuals by mri_segstats, upon a specific segmentation. I was thinking now of a correlation matrix by Pearson's coeff. Any further suggestions?

Also, I've got a pheraps silly question:

- When running a task analysis, I could specify -taskreg and -nuisreg separetly. My assumption is that only -nuisreg are regressed out from the data and that the residuals saved got task-related bold signal. Is it correct?

- If so, could I use task regressors as -nuisreg to get a "pseudo" resting state?

Hoping all question are clear,

Thanks for your patience,

Alice