What trauma would be induced from the orange arrows?

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

Answer: (A)

The main idea here is recognizing a cranial compression dysfunction from inward-directed trauma. When the arrows point toward the midline, they depict forces pushing the cranial bones toward each other, creating a generalized compression of the cranium. In this pattern, the primary issue is a reduction in the space between the bones and a restriction of motion at the skull base and the sagittal suture region, rather than a twist or shift to one side. That inward force produces a symmetric restriction and a tendency for all cranial motions to be dampened, which is characteristic of compression dysfunction.

If the arrows were showing twisting or lateral movement, you’d expect patterns like torsion or sidebending-rotation, where the SBS and cranial vault rotate around an axis or bend to one side with a compensatory rotation. Here, the inward direction aligns with compression, not rotation or lateralization, so the best fit is compression dysfunction.