Supination refers to which movement?

• A. Movement that turns the palm down
• B. Rotation of the forearm
• C. Movement that turns the palm toward the back of the hand
• D. Movement that turns the palm up

Answer: (D)

Supination is the movement of the forearm that turns the palm to face upward. Imagine holding your hand out with the palm up—this orientation is supination. The opposite motion is pronation, where the palm faces downward. The other descriptions either refer to turning the palm down or describe forearm rotation in a more general sense, which do not capture the specific palm-up orientation of supination.