What is the normal range of motion for forearm pronation?

What is the normal range of motion for forearm pronation?

• A. 0-30°
• B. 0-60°
• C. 0-90°
• D. 0-180°

Answer: (C)

Forearm pronation is the rotation that turns the palm from facing forward to facing downward, centered around the proximal and distal radioulnar joints as the radius crosses over the ulna. From the neutral anatomical position, the normal range reaches about 0 to 90 degrees. That means you can rotate the forearm through roughly a right angle to fully turn the palm toward the floor. In practice, many people sit around 75–90 degrees, and 0–90° is the standard reference used in clinical settings for normal pronation. The end feel is typically firm due to the tension of ligaments and the interosseous membrane, with the pronator muscles (pronator teres and pronator quadratus driving the motion) opposing the supinators when returning to neutral.

Forearm pronation is the rotation that turns the palm from facing forward to facing downward, centered around the proximal and distal radioulnar joints as the radius crosses over the ulna. From the neutral anatomical position, the normal range reaches about 0 to 90 degrees. That means you can rotate the forearm through roughly a right angle to fully turn the palm toward the floor. In practice, many people sit around 75–90 degrees, and 0–90° is the standard reference used in clinical settings for normal pronation. The end feel is typically firm due to the tension of ligaments and the interosseous membrane, with the pronator muscles (pronator teres and pronator quadratus driving the motion) opposing the supinators when returning to neutral.