What trauma would be induced from left sidebending rotation?

• A. Left Sidebending Rotation
• B. Right Sidebending Rotation
• C. Left Lateral Strain
• D. Compression Dysfunction

Answer: (A)

Cranial strains are named by how the sphenoid and occiput move relative to each other. In a sidebending-rotation pattern, the bones rotate about oblique axes and sidebend in the same direction. If the motion is to the left, both rotation and sidebending are to the left, which is the left sidebending-rotation strain. So describing the trauma as left sidebending rotation aligns with this pattern exactly. The opposite would be right sidebending rotation, which isn’t the described motion. A left lateral strain is a different pattern where the bones rotate in opposite directions and move laterally, not with the same-direction sidebend-rotation. Compression dysfunction is a distinct category that doesn’t fit the SB-R pattern.