Single segment dysfunctions that are non-neutral are

Single segment dysfunctions that are non-neutral are

• A. Rotated and sidebent in the same direction
• B. Rotated and sidebent in opposite directions
• C. Unrotated
• D. Flexed

Answer: (A)

In non-neutral single segment dysfunctions, the vertebral segment is flexed or extended, so rotation and side bending occur in the same direction. This coupling is described by Fryette’s law for non-neutral mechanics. Therefore, the segment will be rotated and sidebent toward the same side. The opposite-direction coupling happens in neutral segments, while simply being flexed or unrotated doesn’t capture the paired motion of rotation with side bending in the same direction.

In non-neutral single segment dysfunctions, the vertebral segment is flexed or extended, so rotation and side bending occur in the same direction. This coupling is described by Fryette’s law for non-neutral mechanics. Therefore, the segment will be rotated and sidebent toward the same side. The opposite-direction coupling happens in neutral segments, while simply being flexed or unrotated doesn’t capture the paired motion of rotation with side bending in the same direction.