Which term best describes observable movement of the limbs?

The term that best describes observable movement of the limbs is osteokinematics. This concept specifically refers to the movement of bones as they participate in joint movement during various physical activities. It focuses on the trajectory and angles of limb movements and is often described in terms of basic bodily motions such as flexion, extension, abduction, and adduction.

In contrast, arthrokinematics pertains to the small movements that occur between the surfaces of adjacent joints, including rolling, sliding, and spinning. While important for understanding joint mechanics, it does not involve the broader observable movements of the limbs themselves.

Kinesiology is a broader field that encompasses the study of movement, including both anatomical and mechanical aspects of movement, but it does not specifically refer to the observable movements of the limbs alone.

Biomechanics, meanwhile, refers to the application of mechanical principles to the human body, studying how forces interact with human movement, which also includes an analysis of observable movements but is not limited to just that aspect.

Understanding these nuances clarifies why osteokinematics is the most precise term for describing the movements of limbs that are visible and measurable during physical activity.