Pronation - Pronation of The Forearm

Pronation of The Forearm

Supinated An example comparing the pronated and supinated positions of a flexed arm.

This action is performed by pronator quadratus and pronator teres muscle. Brachioradialis puts the forearm into a midpronated/supinated position from either full pronation or supination.

Pronation of the forearm should not be confused with medial rotation of the shoulder. When standing in the anatomical position, medial rotation of the shoulder can perform part of the movement to change the palm from facing ventrally to dorsally. Pronation of the forearm occurs at the radioulnar joint so such a movement does not constitute it. To isolate medial rotation in the shoulder from pronation of the forearm one can stand with one's elbows tucked against the trunk, with the elbows flexed to 90 degrees with the forearms pointing directly in front of the body with the palms of the hands facing upwards. Keeping one's elbows tucked at the sides, the act of moving one's forearms so that the palms are facing downwards is pronation of the forearm.