Question

Pronation is the outward rotation of the forearm.
True
False

Answer 1

Pronation is the rotation of the forearm that positions the palm backward and is not an outward rotation. It involves the radius crossing over the ulna at both the proximal and distal radioulnar joints.

Step-by-step explanation:

The statement 'Pronation is the outward rotation of the forearm.' is False. Pronation is the motion that moves the forearm from the supinated (anatomical) position to the pronated (palm backward) position. The action is facilitated by the rotation of the radius bone at the proximal radioulnar joint, and accompanied by a similar movement at the distal radioulnar joint, where the radius crosses over the ulna, forming an X-shape with these two bones. Conversely, supination is the rotation that moves the forearm back to the palm forward position, with the radius and ulna running parallel.

Answer 2

Pronation is the motion that moves the forearm from the supinated (anatomical) position to the pronated (palm backward) position. The Given Statement is True.

Step-by-step explanation:

Pronation is the motion that moves the forearm from the supinated (anatomical) position to the pronated (palm backward) position. This motion is produced by rotation of the radius at the proximal radioulnar joint, accompanied by movement of the radius at the distal radioulnar joint. The Given Statement is True.