The brachioradialis muscle starts from the outside of your upper arm bone, called the humerus, and runs down your forearm, attaching to the radius bone near your wrist. This muscle is close to the ...

Outward arm action in a jumping jack Rotator cuffs A group of stabilising muscles of the shoulder which helps to prevent dislocation and allows the shoulder to rotate the humerus around its own ...

For example, your elbow joint has two muscles that move your forearm up or down. These are the biceps on the front of the upper arm and the triceps on the back of the upper arm: to raise the ...