A sacral torsion described as 'Right on Left' involves rotation to the right on which axis?

A sacral torsion described as 'Right on Left' involves rotation to the right on which axis?

• A. Right oblique axis
• B. Left oblique axis
• C. Horizontal axis
• D. Vertical axis

Answer: (B)

In sacral torsions, the sacrum twists about an oblique axis through the pelvis, and the pattern is named by both the rotation direction and which oblique axis is involved. For a Right-on-Left torsion, the sacrum rotates to the right while pivoting about the left oblique axis. The left oblique axis runs diagonally through the pelvis, and when the sacrum twists to the right about that axis, the descriptor is left oblique axis. The other axes describe different torsion patterns or motions not matching this rightward rotation about the left oblique axis.

In sacral torsions, the sacrum twists about an oblique axis through the pelvis, and the pattern is named by both the rotation direction and which oblique axis is involved. For a Right-on-Left torsion, the sacrum rotates to the right while pivoting about the left oblique axis. The left oblique axis runs diagonally through the pelvis, and when the sacrum twists to the right about that axis, the descriptor is left oblique axis. The other axes describe different torsion patterns or motions not matching this rightward rotation about the left oblique axis.