Hi all, Kevin M. Wrote in response to Kevin's post
> I am certain that your calculations are correct, I simply fail to
> understand how one can presume to determine pathomechanics without
> including all factors. (GRF through the MTJ, tensions in other tendons,
> angle of Mets, etc.) I am aware that trying to include these would make
> the calculations utterly unruly and that is why we limit the elements in
> the model, but why do we seem to have a problem admitting the stark
> contrast between the model and reality? Modeling is a fine mental
> exercise, to be sure. Certainly, modeling is instrumental in developing
> hypotheses. But the conclusion a simpleton like myself might draw from
> the above is that the foot in question is suffering from a medial heel
> skive deficit.
>
Looking at the location of the center of pressure, in a static situation,
with no muscles acting does take into account all the joints and ligaments
and can be used relatively simply to explain what happens in the foot. Yes
sinus tarsi syndrome is just a medial heel skive deficit. Kevin's
discussion can be shortened to if you move ground reactive force more
medial to the STJ axis then sinus tarsi pain will go away. (Assuming it is
not caused by pronation muscle activity.)
Cheers,
Eric Fuller
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