What describes the movement of turning the palms upward?

What describes the movement of turning the palms upward?

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

Answer: (C)

The movement of turning the palms upward is referred to as supination. This term comes from the Latin word "supinus," which means "lying on one's back." In the context of anatomy, supination involves the lateral rotation of the forearm so that the palm faces up or forwards when the arms are at the sides of the body.

This movement contrasts with pronation, which is the rotation of the forearm causing the palm to face downward or backward. Understanding these terms is fundamental in the study of human anatomy, as they describe essential motions in the upper limb that enable various functional activities, such as holding objects or turning a doorknob.

Inversion pertains to the movement of the foot, specifically turning the sole inward, while rotation refers more broadly to turning around a central axis, which does not specify the direction of the palm. Therefore, supination is the specific term used to describe the act of turning the palms upward.