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02-12-2002, 03:00 AM
Dear Dr Siff


I guess the point may be the amount of damage of the tissues involved. As
you well said a subluxation is a joint "out of alignment" . The tem is
clinically used when the joint surfaces have partial and permanent contact.
When there is a total and permanent lost of contact the term used is
dislocation. Mechanically when the force applied to the join is strong
enough to break completely the ligaments of a join; one have a dislocation
and when the force only broke partially the ligaments on have a suluxation.
Furthermore, a sprain is when the force has made the joints loose contact
(partial or totally) but temporally and there is a ligament damaged. So is
there is not such a big amount of damage of the ligaments the joint will
have only a temporally displacement

> how can a "partial" dislocation be maintained.
Well, for most joints the % of ligament damaged will play the important role
As more % of ligaments are destroyed the joint will go for a simple sprain
to a dislocation. The forces that act in a joint are not at equilibrium in
a dislocation. There is not enough force to reach a dislocation but there
not force form the ligament to pull back the bone to its place.

> Are there any radiological scans or other studies which have confirmed
the existence of "subluxations" or low level
> connective tissue disturbances which allow "partial dislocations" or
"misalignments" to occur chronically,
Subluxations are well document in a X-ray, and there are also protocols to
determined if there is a subluxation. As for any chronic subluxation the
joint will have a chondral lesion with time. A chronic or acute sprain can
be diagnose with a dynamic X-rays, that is the joint is set with a
valgus/varus force and them the X-ray is taken. If there is a sprain the
image will show a "opening or yawn" of the joint at one side.

> despite prolonged imposition of tension, display perfect hysteresis and
return to their pre-pathological state
May be this happens because the experiment gradually increases the tension,
as for example in an accident the force is applied at "once".

I hope to helped "solve" you paradox at least partially. Best regards
Manuel Sotelo MD


PUZZLE & PARADOX 126: SUBLUXATION PARADOX

We constantly hear from colleagues and some therapists that someone's spine
or neck is "out of alignment" or that the bones in some or other part of
the
body are "subluxated" (or held in a prolonged state of chronic partial
dislocation or "mal-location"). At the same time research informs us that
the ligaments and connective tissues involved with those joints are
extremely
tough, only slightly extensible and resist deformation very powerfully.

Even outside the body in being tested in vitro, ligaments and fasciae have
to
be subjected to considerable force to produce significant extension for even
short periods, so how is it possible for apparently resting levels of muscle
tension to produce sufficient force to maintain persistent "subluxation"?
Of course, if the connective tissues concerned are actually damaged or
herniated, then dislocation may be one of the well-known consequences, but
if
the alleged deformation is not of that magnitude, then how can a "partial"
dislocation be maintained.

Naturally, the use of therapy to "release" the hypothetical tension assumes
that these viscoelastic tissues, despite prolonged imposition of tension,
display perfect hysteresis and return to their pre-pathological state
immediately after manipulation or whatever treatment is deemed to be
appropriate.

How can one reconcile these diametrically opposed views? Are there any
radiological scans or other studies which have confirmed the existence of
"subluxations" or low level connective tissue disturbances which allow
"partial dislocations" or "misalignments" to occur chronically, even though
powerful muscles contractions from adjacent muscles may override the alleged
chronic tension produced by tissues which are hypothesized to maintain those
alleged displacements?

-----------

Dr Mel C Siff
Denver, USA
http://groups.yahoo.com/group/Supertraining/

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