Hello to all,
Mailbase is really exciting nowadays. If we could bundle most contributions
together we would have an magnificent course in biomechanics of gait.
Anyone there who has the time and the courage to do it ?
And the most entertaining and certainly instructive aspect of it is the
natural and interactive question-reply structure, like Socrates used to do
in the ancient Greek times. Are we finally circling back to the roots of
our western civilizations and rediscovering ancient wisdom? This mailbase
is great stuff and should be compulsory reading for all students in
podiatry. And it is excellent for mental fitness. So please keep mailbase
alive folks !
To Kevin and others,
Kevin, in the past you stated more than ones :
<<Š pronation magnitudes may not show decreases during gait even though the
foot orthosis may be exerting considerable supination moments across the
subtalar jointŠ.. The motion of the foot may not change, but the moments
acting on the foot certainly do change. >>
If you mean by pronation "subtalar "pronation (defined as the angle between
tibia and calcaneus) I can agree with you. But if you measure pronation by
looking to calcaneal eversion (angle of the calcaneus versus the ground) as
many practitioners do, you'll get a different picture.
It is my clinical experience over the years, that an efficient orthosis
will always diminish calcaneal eversion, though subtalar pronation may
remain unaffected most of the time. This observations come from
quantitative measurments ( I am fortunate to have a Vicon system at my
disposal).
It still bothers me why subtalar pronation does not change as this implies
that tibial varum has to increase if the calcaneal eversion decreases.
Anyway, I prefer to monitor calcaneal eversion as this is a more sensitive
and thus better indicator of the orthotic efficiency than the more familiar
subtalar pronation.
Thanks in advance for any comment.
Regards to all,
Bart Van Gheluwe
.
*******************************************************************
Bart Van Gheluwe
Laboratory of Biomechanics
Vrije Universiteit Brussel -Fac. LK
Vakgroep BIOM
Pleinlaan 2, 1050 Brussel, Belgium
Tel.: 02/629.27.33 (31)
Fax: 02/629.27.36
*******************************************************************
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|