Hi all,

Kevin Miller wrote

>Eric wrote:The proximal attachment of the Ilio Tibial band is so far away
>from the knee that I doubt that it could significantly effect transverse
>rotation of the
>knee. It would seem that as you rotate the tibia on the femur you would
>just twist the fascial band, without much resistance.
>
>Eric, ten years ago I would have agreed with you on this. The origin of
>the IT band does seem too far away to make a difference.  However,
>consider the following:  The IT band is continuous with a relatively dense
>fascial sheath that not only covers most of the quad and extends down the
>lower leg, but also invaginates the muscle groups of the lower
>extremity.  The effect of contraction of muscles within these compartments
>produces increased hydrostatic pressure, resulting in tension of the
>fascia exceeding what the tensor of the fascia latta can produce.  As the
>fascial compartment extends literally from the shoulder and neck to the
>tips of the toes, an impulse or force generated at either end has an
>effect on the other.

Kevin,  I'm not sure what you are saying.  The original post was about how
hip joint moments could create a supination moment at the STJ.    My point
was that the tension in the IT band is predominantly vertical.  There would
have to be horizontal tension to resist transverse plane rotation at the
knee.

>
>To test the capacity for force transfer along this mechanism, have a
>subject sit, feet on the floor, no back support, with knees and hips at 90
>deg. (As sitting in a chair)  Place a finger under the long arch.  Have
>the subject lean forward and backward without bending the knee or
>ankle.  You will feel the plantar fascia tighten under your finger.  In
>some subjects you may feel the calcaneus plantar flex.
>

I'm not seeing it.  HIcks described something similar many years ago where
increased tension in the Achilles tendon, shifting ground reaction force,
distally,  would increase tension in the plantar fascia.  Are you sure this
is not the mechanism causing increased tension in the fascia.


Cheers,

Eric Fuller

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