What is the correct Line of Drive (LOD) when palpating lumbar vertebral rotation?

The correct Line of Drive (LOD) when palpating lumbar vertebral rotation is posterior to anterior (P-A). This approach is essential because it aligns with the axis of the lumbar vertebrae, allowing practitioners to effectively assess and detect any rotation or misalignment in the vertebral segments.

When palpating for vertebral rotation, using a P-A approach directs the palpation force from the back (posterior) towards the front (anterior) of the body. This technique helps in evaluating the position of the vertebrae in relation to their natural alignment. By assessing the movement or resistance when applying this line of drive, practitioners can better determine whether a spinal segment is rotated and to what degree.

Other lines of drive such as A-P (anterior to posterior), I-S (inferior to superior), and S-I (superior to inferior) may not effectively reveal rotational aspects of the lumbar spine. For instance, A-P would not provide insight into how the vertebra is rotating around its axis, and I-S and S-I would primarily be used for assessing different movement patterns rather than rotation. Hence, the P-A line of drive is crucial for accurately evaluating lumbar vertebral rotation.