Medical College of Wisconsin
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Correlation between anatomic foot and ankle movement measured with MRI and with a motion analysis system. Gait Posture 2012 Jul;36(3):389-93



Pubmed ID




Scopus ID

2-s2.0-84864330191   2 Citations


Several studies have attempted to measure how well external markers track internal bone movement using pins drilled into the foot, but this is too invasive for the pediatric population. This study investigated how well a six segment foot model (6SFM) using external markers was able to measure bone movement in the foot compared to MRI measurements. The foot was moved into different positions using a plastic foot jig and measurements were taken with both systems. The aims were to: (1) Look at the correlation between movement tracked with an Electronic Motion Tracking System (EMTS) and by measurements derived from MRI images, specifically the principal intercept angles (PIAs) which are the angles of intersection between principal axes of inertia of bone volumes. (2) To see how well external motion measured by the 6SFM could predict PIAs. Four bone pairs had their movement tracked: Tibia-Calcaneus, Calcaneus-Cuboid, Navicular-1st Metatarsal, and 1st Metatarsal-Hallux. The results showed moderate correlation between measured PIAs and those predicted at the Tibia-Calcaneus, Navicular-1st Metatarsal, and 1st Metatarsal-Hallux joints. Moderate to high correlation was found between the PIA and movement in a single anatomic plane for all four joints at several positions. The 6SFM using the EMTS allows reliable tracking of 3D rotations in the pediatric foot, except at the Calcaneus-Cuboid joint.

Author List

Marquez-Barrientos C, Liu XC, Lyon R, Tassone C, Thometz J, Tarima S


Sergey S. Tarima PhD Associate Professor in the Institute for Health and Equity department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Ankle Joint
Biomechanical Phenomena
Foot Bones
Foot Joints
Magnetic Resonance Imaging
Range of Motion, Articular
Reference Values
Sampling Studies
jenkins-FCD Prod-480 9a4deaf152b0b06dd18151814fff2e18f6c05280