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Pelvic girdle pain and relevance of ASLR testing: A ... - Cindy Verheul

Pelvic girdle pain and relevance of ASLR testing: A ... - Cindy Verheul

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friction <strong>and</strong> movement in the SI joint arises. (A. L. Pool-Goudzwaard et al. 1998; A Vleeming<br />

2007)<br />

At an instability in the SI joint after pregnancy there is usually an increase in counternutation<br />

<strong>and</strong> also a reduced self-locking mechanism. (Jan Mens 2009)<br />

2.1.4 The muscle chains in function <strong>of</strong> stabilizing the pelvis<br />

Because <strong>of</strong> the aim <strong>of</strong> this paper, in describing the stabilizing process <strong>of</strong> the pelvis, the<br />

describtion <strong>of</strong> the muscles is in function <strong>of</strong> stabilizing the pelvis. They are functioning in<br />

chains to support the pelvis.<br />

Pool et al. described three muscle chains to contribute to maintain a stable pelvis.<br />

They speak about a longitudinal, a posterior oblique <strong>and</strong> an anterior oblique sling.(A. L. Pool-<br />

Goudzwaard et al. 1998)<br />

The longitudinal sling:<br />

The longitudinal sling consist the m. multifidus which originates from the sacrum, the deep<br />

layer <strong>of</strong> the thoracolumbar fascia <strong>and</strong> the sacrotuberous ligament <strong>and</strong> attaches the long<br />

head <strong>of</strong> the biceps femoris. A contraction <strong>of</strong> the m. multifidus creates a tendency to nutation.<br />

Which increases the tension in the interosseous <strong>and</strong> short dorsal sacroiliac ligaments.<br />

This muscle chain also inflates the thoracolumbar fascia.<br />

By the contraction <strong>of</strong> the mm. erector spinae <strong>and</strong> the long head <strong>of</strong> the m. biceps femoris, the<br />

tension in the sacrotuberous ligament increases. All these effects <strong>of</strong> the longitudinal sling<br />

has an stabilizing effect on the SI joints, through the compression force. (A. L. Pool-<br />

Goudzwaard et al. 1998)<br />

The posterior oblique sling:<br />

The posterior oblique sling starts with the contraction <strong>of</strong> the m. latissimus dorsi <strong>and</strong> the m.<br />

gluteus maximus. The function <strong>of</strong> these muscles are synergistically. In this muscle chain the<br />

anatomical connections <strong>of</strong> the muscles with the thoracolumbar fascia <strong>and</strong> the sacrotuberous<br />

ligaments are responsible for the increasing compression force on the pelvis to support the<br />

stability. (A. L. Pool-Goudzwaard et al. 1998)<br />

Osteopathie Schule Deutschl<strong>and</strong><br />

Dresden International University Page 15

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