dear list,
apologies if this has been covered (i couldnt see it in the 100 or so movement parameter related messages i surveyed)
from what i gather, including movement movement parameters in the design matrix is a good idea even if you have already
realigned because it can remove additional artifacts not removed by rigid body transformations, assuming that your movement params
are not correlated with your regressors of interest.
but this only regresses out artifacts, it does not regress out the bold activity which may be underlying some of the movement.
so i was thinking, wouldnt it make sense to convolve the movement parameters with the hrf to model some of the underlying neuronal
causes of the movement. obviously the same caveat would apply with regard to these regressors not being correlated with your
regressors of interest.
does this make sense as something to do and has anyone done this?
with very best wishes
alley
