Dear Kevin,
Thanks for the great info
>Kevin replies:
>
>Two days ago, I was assisting my orthopedic surgeon partner in a
>case for a lateral ankle stabilization procedure and was closely
>inspecting the peroneus longus/brevis excursions during
>pronation/supination. Even though I didn't do an exact measure, I
>would estimate, that at the level of the lateral malleoulus, in a 5'
>5" female with a normal arched foot the peroneus longus tendon moved
>approximately 20-25 mm from full pronation to full supination and
>from neutral to maximally pronated moved less than a centimeter
>(probably around 8 mm). A thigh tourniquet was used so the anatomy
>was not affected by tourniquet position. In response to Daryl's
>excellent comment, due to the length of the peroneus longus muscle,
>I would imagine that it retains good strength throughout this small
>amount of tendon excursion and its strength would not be affected
>greatly by the shortening that occurs with pronation. Don't know of
>any studies that have measured this, however.
>
>
>Bart, the other anatomical course-changer for the peroneus longus
>tendon is the peroneal tubercle on the lateral wall of the calcaneal
>body. Now you may enjoy your weekend in peace. ;-)
.... and for your kind teaching instruction.
Regards,
Bart
--
*******************************************************************
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
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