What term describes the motion of rotating the hand so the palm is facing up?

The term that describes the motion of rotating the hand so the palm is facing up is "supination." This movement is characterized by the turning of the forearm and wrist to position the palm facing upwards or forward. Supination occurs when the radius and ulna bones of the forearm are parallel to each other.

In anatomical terms, supination can also refer to the movement of the foot where the sole turns inward, but in this context, it specifically relates to hand positioning. This is a fundamental motion in various activities, such as holding a bowl of soup or performing a bicep curl. Understanding this term is essential for anyone studying kinesiology or sports medicine, as it relates to many actions involving the upper extremities.