Prof. Emeritus Peter Huijing PhD – Fascia@sea

15 november 2019

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Experimental results of force transmission between muscles and bone and other tissues.

What the manual practitioner should know about that.

Over the past 15 years, my (previous) research group at has been active in studying, what we call myofascial force transmission and found some amazing results indicating that muscle forces and loads are not only exerted via the myotendinous junction at the tendon. but also “sideways”along the full periphery of muscle fibers muscles. The anatomical and histological work indicates a continuity of all tissues within the leg and arm, with a possible exception of the aponeuroses (tendon plates). The relevance for the manual therapies (in the widest possible sense of that word) of such findings is evident

The experimental work was directed at showing the feasibility and repeatability of such force transmission an finding out how this affects potential interaction between muscles.

A most important result is that muscular forces exerted at origin and insertion are seldom equal (proximo-distal force differences, their presence constitutes absolute proof for myofascial force transmission) for the conditions studied. Also mechanical interaction between synergistic muscles and even between antagonistic muscles were found. A bird’s eye view will be given of such results.

A finding most important for the manual therapies is the result that muscular forces exerted at origin and insertion are not only dependent on muscle length, but also on the relative position of the tissues with respect to each other. If, for example, a muscle kept at constant length is moved through its natural connective tissue surroundings the forces exerted by muscles are affected substantially. In the manual therapies applying, very locally, high changes in relative position (i.e. high shear strains ) is the common mode of applying such therapeutics.

As the experimental work to be presented has a fundamental character necessary to gain sufficient control to allow scientific proof (and initially not a clinical nature. Particularly, in such work there are drawbacks to be considered, which will be discussed as well.

This presentation contains scientific results, that may reinforce ideas presented by several presenters . particularly those of the first presentation of Dr. van der Wal and the one of Dr. Schleip.

In any case, it opens a path for new ways of thinking e.g. in the manual therapies, surgery, as well as the basic sciences.

Friday 11.45-12.30 Prof. Emeritus Peter A. Huijing

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