What is the term for rotation of the forearm so that the palm faces posteriorly?

What is the term for rotation of the forearm so that the palm faces posteriorly?

• A. Rotation of forearm
• B. Inversion of forearm
• C. Pronation of forearm
• D. Supination of forearm

Answer: (C)

Pronation of the forearm is the rotation that turns the palm to face posteriorly. When the forearm pronates, the radius crosses over the ulna, so the palm moves from facing forward to facing backward relative to the body. This is the opposite of supination, where the palm faces forward and the two bones are parallel. The general term “rotation of forearm” is too broad, and inversion refers to turning the foot, not the forearm. So the described movement is pronation.

Pronation of the forearm is the rotation that turns the palm to face posteriorly. When the forearm pronates, the radius crosses over the ulna, so the palm moves from facing forward to facing backward relative to the body. This is the opposite of supination, where the palm faces forward and the two bones are parallel. The general term “rotation of forearm” is too broad, and inversion refers to turning the foot, not the forearm. So the described movement is pronation.