Which movement involves rotating the forearm palm down?

The movement that involves rotating the forearm so that the palm faces down is called pronation. In this motion, the radius and ulna bones of the forearm cross over one another, allowing the palm to turn away from an anterior (upward-facing) position to a posterior (downward-facing) position. This is commonly observed in actions such as placing the palms down on a table or during certain movements in sports where the hand position needs to be adjusted downward.

Understanding pronation is key in various applications, such as assessing movements in sports, understanding certain postural changes, and performing manual therapies. It is an essential concept in kinesiology, particularly when exploring the biomechanics of the upper extremity.