Torque is delivered from SCP toward which direction?

• A. Feet
• B. Opposite PSIS
• C. Midline
• D. Sacral apex

Answer: (C)

The force direction in this context is about how torque is applied from the contact point to produce a controlled rotary correction. When torque is directed toward the midline, the adjusting force creates rotation of the vertebral segment around its vertical axis so that the segment moves and resumes alignment toward the center of the spine. This medial-directed torque favors restoring sagittal balance and minimizes unwanted lateral shear or translation.

Directing torque toward the feet would tend to push the segment downward, not produce the intended rotation. Aiming toward the opposite PSIS would push the segment away from the midline, causing lateral displacement rather than a clean rotation toward proper alignment. Directing toward the sacral apex would follow a different vector that isn’t aligned with the desired midline rotation. Therefore, directing torque toward the midline best achieves the intended corrective rotation from the SCP.