What axis is involved in torsion of the SBS?

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Prepare for the OMM 6 Cranial Evaluation and Treatment Test. Use flashcards and multiple-choice questions, each with hints and explanations. Get ready for your exam!

Multiple Choice

What axis is involved in torsion of the SBS?

Explanation:
Torsion of the SBS occurs when the sphenoid and occiput rotate in opposite directions about an axis that runs from front to back through the skull. This anteroposterior axis is the defining line for torsion, with the two bones twisting around it in opposite ways. Other axes describe different cranial movements: rotating about a left–right (transverse) axis or about a vertical axis would produce different patterns not characteristic of SBS torsion, and a horizontal axis isn’t the standard axis described for this motion. So the axis involved is the anteroposterior axis with the bones turning in opposite directions about that line.

Torsion of the SBS occurs when the sphenoid and occiput rotate in opposite directions about an axis that runs from front to back through the skull. This anteroposterior axis is the defining line for torsion, with the two bones twisting around it in opposite ways. Other axes describe different cranial movements: rotating about a left–right (transverse) axis or about a vertical axis would produce different patterns not characteristic of SBS torsion, and a horizontal axis isn’t the standard axis described for this motion. So the axis involved is the anteroposterior axis with the bones turning in opposite directions about that line.

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