What is the typical range of motion in a healthy knee?

What is the typical range of motion in a healthy knee?

• A. 0 to 90 degrees
• B. 0 to 120 degrees
• C. 0 to 135 degrees
• D. 0 to 150 degrees

Answer: (C)

The typical range of motion in a healthy knee joint is generally considered to be from 0 degrees of extension to 135 degrees of flexion. This range allows the knee to fully straighten and bend adequately to facilitate various movements required in daily activities and sports. Flexion of up to 135 degrees is necessary for actions like sitting down, squatting, and rising from a sitting position, while full extension at 0 degrees is crucial for standing and maintaining stability. In a healthy joint, this range supports the functionality and biomechanics necessary for mobility, aligning with the movements incorporated in many physical functions. While the other ranges presented may represent specific scenarios or pathological states, they do not accurately capture the normative functional range for a healthy knee. Hence, the choice indicating the range of 0 to 135 degrees is consistent with typical anatomical and functional parameters for knee mobility.

The typical range of motion in a healthy knee joint is generally considered to be from 0 degrees of extension to 135 degrees of flexion. This range allows the knee to fully straighten and bend adequately to facilitate various movements required in daily activities and sports.

Flexion of up to 135 degrees is necessary for actions like sitting down, squatting, and rising from a sitting position, while full extension at 0 degrees is crucial for standing and maintaining stability. In a healthy joint, this range supports the functionality and biomechanics necessary for mobility, aligning with the movements incorporated in many physical functions.

While the other ranges presented may represent specific scenarios or pathological states, they do not accurately capture the normative functional range for a healthy knee. Hence, the choice indicating the range of 0 to 135 degrees is consistent with typical anatomical and functional parameters for knee mobility.