Comprehensive Osteopathic Medical Licensing Examination (COMLEX USA) Practice

For a Right on Right sacral torsion, which statement about the lumbar curvature is correct?

1. Curved convex to the left

2. Curved convex to the right

3. Curved concave to the right

4. Curved concave to the left

The correct answer is: Curved convex to the right

In a Right on Right sacral torsion, the lumbar curvature is characterized by a convexity to the right. This is because the sacrum rotates to the right, which affects the alignment and mechanics of the lumbar spine. When the sacrum is in a right torsion, the lumbar regions above tend to adapt by increasing the convexity on the same side. In this case, the lumbar spine will curve outward, which is described as convex to the right. This adaptive mechanism helps to maintain balance and posture, as well as minimize stress on the surrounding structures by aligning with the altered position of the sacrum. Understanding this pattern is crucial in osteopathic practice, as it relates to the assessment and treatment of somatic dysfunction. The mechanics of the lumbar spine, in response to the sacral torsion, can significantly influence treatment approaches.