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Sacral Nutation Linked to %20Icon.jpg)
Cranial Sacral (Descending) Model - Motion in the Sacrum linked to Motion in the Cranium
Below is an animated model demonstrating the theoretical coupling motion between the cranial bones and sacrum. Movement of the cranial bones is thought to occur between the sutures and is reported to be less than 1/100th of a centimeter (the width of a human hair). A cranial lesion can lock the sacrum in either a nutated (anterior) or counternutated (posterior) position.
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Below is an animated model demonstrating the theoretical coupling motion between the cranial bones and sacrum. Movement of the cranial bones is thought to occur between the sutures and is reported to be less than 1/100th of a centimeter (the width of a human hair). A cranial lesion can lock the sacrum in either a nutated (anterior) or counternutated (posterior) position.
The movement of the Occiput, Sphenoid and Frontal bones
are exaggerated for purposes of demonstration only.
Glossary Of Osteopathic Terminology
Usage Guide, April 2004, Figs 57-8, pp 24
