Dear Ray
>>>>>>>>>>>>>>>>>>
I would be really grateful if you would take the time to briefly
describe the movement of the axis during a single support phase
and briefly explain how the forefoot can appear to abduct and
dorsiflex at the " lateral column" (for want of a much better term)
yet invert around the "medial column" with closed-chain foot
pronation where the calcaneus is seen to evert relative to
the supporting surface.
>>>>>>>>>>>..
Sorry, sometimes I get a bit slow in replying.

I m not sure that you can say that the forefoot inverts at the medial
col and abducts and dorsiflexes at the lateral column. Thats
certainly not what we are saying, or what we measured. We
measured what we perceive to be the navicular and cuboid together
moving relative to the calc. There is no reason why they (our nav
and cuboid) cannot invert, abduct and dorsiflex relative to the calc.
If  the medial column was to invert relative to calc as the calc
everts relative to the ground, it would be doing the abduction and
dorsiflex bits too. As, in our model, would the cuboid relative to the
calc.

Anyway, we described the nav/cuboid segment inverting,
dorsiflexing and adducting in contact phase, and everting,
plantarflexing and adducting during propulsion. I see no problem
with this? And there appears to be little or no motion during mid
stance.

Cheers
chris

Dr Christopher Nester  BSc PhD
Research Fellow
Brian Blatchford Building
School of Health Care Professions
Centre for Rehabilitation and Human Performance Research
University of Salford
Salford
M6 6PU
England

TEL:0161 295 2275
FAX:0161 295 2302

-----------------------------------------------------------------
This message was distributed by the Podiatry JISCmail list server

to leave the Podiatry email list send a message containing the text
leave podiatry
to [log in to unmask]

Please visit http://www.jiscmail.ac.uk for any further information
-----------------------------------------------------------------