Which muscle is responsible for flexing the arm at the elbow joint?

Elbow muscles are commonly referred to as flexors or extensors, depending on how they affect elbow movement. The extensors are located inside the arm and help to extend the arm outward. The flexors are at the back of the elbow and pull it closer to the body by flexing the elbow. The brachioradialis muscle is the muscle of the forearm that flexes the arm at the elbow. The elbow muscle helps to stretch the forearm at the elbow. The shoulder muscle helps to bend the elbow inward towards the body. The pronator circular is a muscle that extends from the head of the humerus to the elbow joint and ulna to help flex the elbow.