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Can back pain caused by symptom-giving sacroiliac joint relaxation ...

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The sacrouterine ligaments<br />

The sacrouterine ligaments attach at the level of the uterine isthmus and connect the<br />

uterus to the sacrum and the rectum. They constitute a posterior reinforcement of the<br />

rectouterine folds and prevent the cervix from moving in the direction of the urinary<br />

bladder and the symphysis. [3, 40]<br />

1.1.4. Innervation<br />

Innervation of the SIJ<br />

The <strong>joint</strong> capsule is innervated <strong>by</strong> dorsal branches coming from S1, S2 and S3. [24,<br />

58]<br />

Innervation of the uterus<br />

The uterus is innervated <strong>by</strong> sympathetic nerve branches coming out from the<br />

vertebral segments T10 to L2, running via the splanchnic nerves down to the celiac<br />

ganglion and superior and inferior mesenteric ganglion as well as to the renal plexus.<br />

These nerves extend, either together with blood or lymphatic vessels or as<br />

independent nerve fibres, to the hypogastric plexus and the uterovaginal plexus.<br />

There is discussion about a post-ganglionary innervation coming from the four sacral<br />

ganglia and the ganglion impar. [18]<br />

The uterus also has a parasympathetic innervation coming out from the vertebral<br />

segments S2 to S4 and extending to the uterovaginal plexus.<br />

1.1.5. Muscular structures<br />

The pelvic floor, the abdominal wall and the thoracic diaphragm are three anatomic<br />

regions that play a central role in pregnancy and that are subject to major changes<br />

during this period. [35]<br />

Any further detail in the description of the muscular structures would go beyond the<br />

scope of this study.<br />

Master’s Thesis Wolfgang Aspalter 17

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