What is the normal range of motion for forearm supination?

What is the normal range of motion for forearm supination?

• A. 0-90°
• B. 0-45°
• C. 0-100°
• D. 0-80°

Answer: (A)

Forearm supination is the rotation that turns the palm to face upward from the neutral position. In a healthy person, the forearm can rotate from neutral through about 0 to 90 degrees. This means you start at the palm-facing forward position and can reach full supination by roughly 90 degrees. Because this represents full, typical rotation, it best fits the normal range of motion expected for supination. The other options either cap the movement too early, slightly exceed common limits, or reflect a range that some sources place below full capacity, whereas 0 to 90 degrees aligns with full, normative supination.

Forearm supination is the rotation that turns the palm to face upward from the neutral position. In a healthy person, the forearm can rotate from neutral through about 0 to 90 degrees. This means you start at the palm-facing forward position and can reach full supination by roughly 90 degrees. Because this represents full, typical rotation, it best fits the normal range of motion expected for supination. The other options either cap the movement too early, slightly exceed common limits, or reflect a range that some sources place below full capacity, whereas 0 to 90 degrees aligns with full, normative supination.