What does pronation of the forearm refer to?

Pronation of the forearm refers to the rotation of the forearm such that the palm of the hand faces downward. This movement occurs at the radioulnar joints, where the radius and ulna bones of the forearm cross over each other. When you perform pronation, your palm moves from an upward-facing position (supination) to a downward-facing position, which is crucial for various daily activities, such as typing or using utensils. Understanding this term is essential, particularly in contexts like physical rehabilitation or ergonomics, where the mechanics of hand and forearm movement are important. The other options describe different movements: one describes supination, another indicates wrist movement unrelated to pronation, and the last one refers to finger extension rather than forearm rotation.