Which movement is correctly paired with its axis of rotation?

Trunk lateral flexion involves bending the trunk to the side. This movement occurs around the Z axis, which runs vertically through the body from head to toe. When the trunk laterally flexes, the trunk moves in a frontal plane, meaning it moves side to side, while the rotation around the Z axis allows for this lateral bending action. Understanding the relationship between movements and their respective axes of rotation is crucial in biomechanics, as it helps to identify the primary movements occurring in various activities and the mechanical principles governing them.

The other movements listed are associated with different axes of rotation, which is why they are not the correct pairings. For instance, trunk rotation occurs around the Y axis, shoulder abduction involves movement about the X axis, and trunk flexion typically occurs around the sagittal plane, which aligns with the X axis as well. Recognizing these associations can enhance comprehension of body mechanics in clinical settings.