Forearm supination

  • Biceps Brachii

    Biceps Brachii Muscle

    The Biceps brachii crosses both the elbow and shoulder joints. Its action on the shoulder joint is very weak flexion.

  • Brachioradialis

    Brachioradialis Muscle

    The Brachioradialis muscle acts to supinate the forearm from a pronated position, when it flexes the elbow. When starting in a supinated position, it acts to pronate the hand as it flexes the elbow.