Mel Siff:
<Only muscles or external forces may produce moments and it is not the
muscles, so that the postulated moment must be the result of external
movement as encountered during stabilisation or gait.>
Simon Spooner wrote:
<<Your above conjecture is just not true- sorry. Any tissue which generates a
force about a joint axis may produce moment- simple physics. >>
*** Sorry, this is not conjecture, but simple physics. I was being
scientifically pedantic. Generation of a moment is the result of a force.
Passive tissues may transmit tensions or forces, but they do not 'generate'
forces. Either the muscle directly produces a moment about a fulcrum OR a
moment is produced by one of the following:
1. Another muscle that is not directly associated at all with the joint or
tissues concerned,
2. Another action like a fall or landing after propulsion from another limb
3. Gravity acting on a given system.
Whatever the case may be, there has to be a primary force present somewhere
to produce the action about the given fulcrum. Fasciae do not 'produce'
forces.
Mel Siff
Dr Mel C Siff
Denver, USA
http://groups.yahoo.com/group/Supertraining/
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