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.
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Specifications

Category:Algorithm or Reusable Library
License:GNU General Public License (GPL)
Development Status:5 - Production/Stable/Mature
Domain:MR
Intended Audience:Developers, End Users
Natural Language:English

Associations

works well with:SPM

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Main Folder documentation

README.txt posted by Kenny Vaden on Feb 28, 2013

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pythagoras: Pythagorean_Motion_version_20130220 release

Pythagorean_Motion_version_20130220.zip posted by Kenny Vaden on Feb 28, 2013

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pythagoras: Pythagorean_Motion_version_20130220 release

http://www.nitrc.org/projects/pythagoras/ posted by Kenny Vaden on Feb 28, 2013

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open-discussion forum

Welcome to Open-Discussion posted by Kenny Vaden on Feb 28, 2013

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Welcome to Help posted by Kenny Vaden on Feb 28, 2013