Hi-
Could you please be more specific about what you mean by "combine"? Can you also describe more about those time series---from the partial filename, they appear to be resting state FMRI time series. But are they each full, 4-dimensional volumes (a seriers of 3D volumes stuck together across time), or are they just 3-dimensional time points that you want to concatenate to make a 4-dimensional volume? Or are they something else completely?
Also, in a terminal, what is the output of:
3dinfo -n4 -ad3 -prefix ADNI_129*
?
--pt