Spondylolisthesis describes which movement?

Spondylolisthesis describes which movement?

• A. Forward slippage of a vertebra relative to the one below it
• B. Backward slippage
• C. Lateral displacement
• D. Rotation

Answer: (A)

Spondylolisthesis is defined by the forward (anterior) displacement of a vertebral body relative to the vertebra beneath it. This forward slippage distinguishes it from backward slippage (retrolisthesis), lateral displacement, or rotation, which are not descriptions of spondylolisthesis. So the movement described is forward slippage of the vertebra relative to the one below it.

Spondylolisthesis is defined by the forward (anterior) displacement of a vertebral body relative to the vertebra beneath it. This forward slippage distinguishes it from backward slippage (retrolisthesis), lateral displacement, or rotation, which are not descriptions of spondylolisthesis. So the movement described is forward slippage of the vertebra relative to the one below it.