Which joints produce pronation and supination movements of the forearm?

The pronation and supination movements of the forearm primarily occur at the proximal radioulnar joint and the distal radioulnar joint. These joints are specifically designed to allow the rotational movement of the forearm around the axis of the radius and ulna.

In pronation, the palm of the hand turns to face downwards, while in supination, the palm turns to face upwards; these movements are facilitated by the interaction between the proximal and distal radioulnar joints. The radius rotates over the ulna during these movements, allowing for a wide range of functional motions in the forearm.

Other joints mentioned do not contribute significantly to these specific movements. For instance, the humeroulnar joint primarily facilitates flexion and extension of the elbow rather than rotation. The wrist joint is more involved with movements involving the hand and wrist, while the shoulder joint affects the arm's position but does not produce the forearm's supination and pronation. Thus, the choice highlighting the proximal and distal radioulnar joints is indeed accurate.