Which muscles turn your hand so it faces palm down?

The muscles responsible for turning your hand so that the palm faces down are called pronators. When these muscles contract, they initiate a movement known as pronation, which specifically involves rotating the forearm so that the radius and ulna cross over each other. This action results in the palm being oriented downward.

The pronator teres and pronator quadratus are the primary muscles involved in this process, working together to facilitate the movement. Understanding this mechanism is essential for various activities, including certain sports, manual tasks, and everyday functions where the orientation of the hand is crucial. The actions of the other muscle groups, such as supinators, flexors, and extensors, relate to different movements, such as turning the palm up, bending the wrist, or extending the fingers, respectively, highlighting the significance of the pronators in achieving palm-down orientation.