Dear Gang,
So much thanks for your suggestion. I found that by the plug-in deconvolution,and DC fit,the modeled curve fit the original time series to some extent, and below the baseline.So this meant the deactivation should not be doubted?
In addition, due to the task was naming, in some time points,the movement was big,such as head jerk.So should I add motion parameters into the GLM? And if I added time lag, such as maxlag=3, but only the first lag(1 0 0 0)was examined, by which deactivation decreased significantly,was it reasonable?
I am really confused.Your response are highly needed.Thanks go to everyone providing any suggestions!