Hello Kevin and Eric and of course the interested audience,
Thanks for both your explanations. I still have to digest them fully,
but apparently no cell in my brain seem to object.
Anyway, they gave me a basis to chew on and certainly will help my
discussion. So thanks for contributing.
One question/comment to Eric, though.
Eric, you said
>>>
The reason that I am interested is that there are often two
pronation phases in some patients. There is the initial contact
phase pronation and then the late stance phase pronation. In other
feet there is the single early phase of pronation.
>>>
I agree with you that often the pronation process occurs in two
subsequent phases.
But navicular drop has only sense when measured during the midstance
phase. when the whole foot is flat on the ground. Therefore,
navicular drop is only an estimation of late stance pronation. And
looking to the graphs of navicular drop, they always reveal a
U-shaped curve with the middle part covering the midstance phase.
As for the navicular height in static stance, I did not look at it
till now though we recorded it. So, thanks for the suggestion as I
think it may be worthwhile to look as these data.
Eric concluded:
>>>
One of the problems of looking at group data is that there may be
different explanations of what is occurring. This is what makes
research on foot function so hard. The variability of muscle
activity across individuals is hard to account for.
>>>
Right you are !
Best regards,
Bart
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