Hey Yajing 

"First,
the 'art_regression_timeseries_*.mat' file contains two parts, the first line is about the global signal, and the second line is the motion information. But, what do the values in each line represent? How are the values calculated in each line? Does the second line mean the FD or the composite-motion?"

I cannot answer your questions, but I was wondering if you've used the 'art_regression_timeseries_*.mat' file in your processing at all. 



Thanks 
Fatima