Right lateral flexion of the trunk occurs around the Z axis in which direction?

Right lateral flexion of the trunk occurs when the trunk bends to the right side. In the context of a three-dimensional coordinate system, this motion is classified as an angular movement around the Z axis, which represents the vertical axis through the body.

The direction of this lateral flexion is designated as positive when the motion is towards the right side. Therefore, in this scenario, the movement can be effectively described by a positive angle about the Z axis, which aligns with the understanding of rotational directions in clinical biomechanics. The positive angular direction typically indicates a counter-clockwise rotation when viewed from above, corresponding perfectly with the right lateral position of the trunk.

When analyzing the other choices, they involve movements along the X axis, but lateral flexion specifically pertains to the Z axis, making that option irrelevant to the question. Understanding both the anatomy involved and the conventions of angular measurements in biomechanics reinforces why the chosen answer is the correct identification for this specific movement.