Which type of joint motion is typically assessed by a physical therapist?

Flexion and extension are fundamental types of joint motions that are commonly assessed by physical therapists during evaluations and treatment plans. These movements occur in a sagittal plane and can be easily observed and measured, making them crucial for assessing range of motion, joint function, and overall mobility. Flexion refers to the decreasing angle between two body parts, such as bending the knee or elbow, whereas extension is the opposite movement, increasing that angle, as seen in straightening the knee or elbow.

These movements are essential indicators of functional mobility and can directly affect a person's ability to perform daily activities and exercises. Accurate assessment of flexion and extension can help therapists identify limitations or abnormalities in joint function and provide targeted interventions or rehabilitative exercises to improve mobility and strength.

Other options, while valid types of motion, are either less fundamental or more complex, making them less common targets for initial assessments by physical therapists focusing on basic functional mobility. For instance, rotation and circumduction involve more complicated joint actions, and diagonal and fluid motions can be more relevant in specific contexts rather than as primary evaluative movements.