Which range of motion assessment is vital for knee injuries?

The assessment of flexion and extension is crucial for knee injuries because these movements directly relate to the primary functions of the knee joint. The knee is a hinge joint, primarily allowing for bending (flexion) and straightening (extension) motions. Evaluating these ranges of motion helps to identify impairments or limitations in the joint's functionality, which is typically a significant concern following a knee injury.

Assessing flexion provides insights into the ability to bend the knee, which is vital for activities like walking, running, and sitting. Extension assessment reveals how well the knee can be straightened, which is essential for stability and support while standing or engaging in physical activities.

Understanding the degree of flexion and extension can also indicate the severity of an injury, guide rehabilitation protocols, and determine readiness for return to activities. In contrast, the other options relate to different joints or movement patterns that are not as directly relevant to knee injuries.