Pythagorean Displacement and Motion Regressors

This Matlab script uses the Pythagorean Theorem to calculate head motion and position, while preserving degrees of freedom. The motion parameters output by SPM (rp*.txt) estimate head position relative to the first volume in 3D translation and 3D rotation, which are often entered as a nuisance regressor during individual-level statistics. Regressing the total displacement and relative position can potentially explain more variance in voxel-level BOLD signals that is related to head movement during an fMRI experiment.

Download Now Download

OR   See All Files

Specifications

Category:
License:
Development Status:
Domain:
MR
Intended Audience:
Natural Language:

Associations

works well with:
SPM