What trauma would be induced from #5?

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

Answer: (C)

The main idea is how trauma can create a lateral strain in cranial mechanics. In lateral strains, the key feature is a shift of the sagittal (sphenobasilar) fulcrum off the midline toward one side, while the sphenoid and occiput rotate in opposite directions about parallel vertical axes. If the force from #5 pushes the skull toward the right, the SBS would deviate to the right, producing a right lateral strain. That pattern reflects a sideways displacement rather than pure vertical movement or a combined sidebending with rotation. The other possibilities describe different motion patterns: a vertical strain moves the SBS up or down; a left lateral strain would shift the SBS to the left; a left sidebending rotation involves tilting with rotation around oblique axes rather than a simple rightward shift.