Biceps Brachii
The Biceps brachii crosses both the elbow and shoulder joints. Its action on the shoulder joint is very weak flexion. It works most efficiently in
Elbow flexion
Brachialis
The Brachialis acts to flex the elbow whether in pronation or supination, along with Biceps Brachii. As Brachialis is attached to the Ulna, which cannot
Brachioradialis
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
Pronator Teres
Pronator Teres works the hardest when the elbow is flexing the hand simultaneously pronating.