What trauma would be induced from #2?

What trauma would be induced from #2?

• A. Left torsion
• B. Right torsion
• C. Inferior vertical strain
• D. Right lateral strain

Answer: (B)

Understanding cranial torsion helps explain why a rightward pattern is labeled as a right torsion. Torsion is when the sphenoid and occiput rotate in opposite directions about an anteroposterior axis; the direction is named for the way the sphenoid rotates relative to the occiput. If the diagram shows the sphenoid turning to the right while the occiput turns to the left, that creates a right torsion. This results from a twisting force that biases the head to rotate toward the right, producing opposite rotations of the two bones. The mirror image would be a left torsion if the opposite pattern were present. By contrast, an inferior vertical strain would involve vertical displacement of the SBS without opposing rotation, and a right lateral strain would show unilateral lateral displacement with a different rotation pattern along the vertical axis.

Understanding cranial torsion helps explain why a rightward pattern is labeled as a right torsion. Torsion is when the sphenoid and occiput rotate in opposite directions about an anteroposterior axis; the direction is named for the way the sphenoid rotates relative to the occiput. If the diagram shows the sphenoid turning to the right while the occiput turns to the left, that creates a right torsion. This results from a twisting force that biases the head to rotate toward the right, producing opposite rotations of the two bones. The mirror image would be a left torsion if the opposite pattern were present. By contrast, an inferior vertical strain would involve vertical displacement of the SBS without opposing rotation, and a right lateral strain would show unilateral lateral displacement with a different rotation pattern along the vertical axis.