Movement at the subtalar joint is believed to be a fundamental contributor to
foot function during walking. The complex structure and movement, and
inaccessibility of the joint have resulted in limited published data with which to
substantiate or refute theories regarding its movement during walking. This
study investigated the use of the CODA M PX30 three d imensional motion
analysis system and a purpose designed marker placement model as a strategy
for measuring the movement of the subtalar joint during the contact phase of
walking. The in vitro reliability of the measurement strategy was tested and the
combination of the CODA M PX30 and the marker placement model shown to
be reliable. The effect of skin movement on surface marker location was
investigated. Although markers were shown to move relative to the bones,
angular orientations calculated from marker positions were shown to be
representative of those calculated directly from the bones. The in vivo reliability
of the measurement strategy was tested using multiple data sets from a single
subject. Results showed the measurement strategy to be reliable and to
produce results comparable to previous published data. Subsequent testing on
m u ltiple subjects produced a similar outcome. The novel measurement strategy
described in this study was shown to be a valid non-invasive, i n vivo method of
assessing the movement of the subtalar joint during the contact phase of
walking.
| Date of Award | 2006 |
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| Original language | English |
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| Awarding Institution | |
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The kinematics of the subtalar joint during the contact phase of walking - a novel measurement strategy
Birch, I. (Author). 2006
Student thesis: Doctoral Thesis