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jbraman81
07-08-2008, 02:50 AM
Hello,

I am working on trying to understand the differences between internal vs.
external varus/valgus wedging in relation to the change in center of
pressure. I have read literature that describes what I would consider to
be internal wedges changing the center of pressure opposite of the wedging
condition (i.e. lateral/valgus wedge shifting COP medial and vice versa).
These two studies are: EFFECT OF SHOE MODIFICATIONS ON CENTER OF PRESSURE
AND IN-SHOE PLANTAR PRESSURES (Xu, et. al. 1999) and A METHOD FOR
MEASURING FOOT PRESSURES USING A HIGH RESOLUTION, COMPUTERIZED INSOLE
SENSOR: THE EFFECT OF HEEL WEDGES ON PLANTAR PRESSURE DISTRIBUTION AND
CENTER OF FORCE (Rose, et. al. 1992). There is a third study that calls
these interventions external and their wedge internal and have found the
opposite result (lateral/valgus wedge shifting COP lateral). The title of
this paper is CHANGES IN PLANTAR FOOT PRESSURE WITH IN-SHOE VARUS OR
VALGUS WEDGING (Gheluwe and Dananberg, 2004) I am hoping that someone may
be able to shed light on this topic, and would appreciate any response.

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Jerrod Braman
Orthopaedic Biomechanics Laboratories
Michigan State University
bramanj1@egr.msu.edu