Dear all,
We would like to investigate multiple covariances on a structural level.
For our research, we use SPM 12 and the automatic segmentation software of Billot et al.
When we run a multiple regression, there are implausible results. We have performed analyses with and without TIV and set it as a nuisance parameter. But none of our experiments gave the desired result.
Our assumption is that there is a problem with the native hypothalmus volume. The volume is supplied as native volume by the segmentation software and we believe that the TIV and the hypo volume interfere.
Do any of you have an idea how to solve this problem. Does the hypothalamus volume still need to be modified before to use it in SPM analysis?
Thank you!
Christian
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