You have 20 muscles in your forearm, the part of your arm between your elbow and your hand. They help you move your arms, hands, and fingers and perform many of the tasks of daily life. You can ...

The 20 muscles of the lower arm are divided into anterior (front of the arm) and posterior (back of the arm). They can be superficial (near the skin) or deep (underlying the superficial group).

The arm extends ... the only muscle in this layer. It attaches to the base of the hand and allows people to flex their fingers. Some people classify this muscle as part of the superficial layer ...