Description:

 

Muscles in the shoulder area include the trapezius anterior and the serratus anterior. In the forearm attached to the humerus are the triceps (which is an extensor), biceps, brachialis, and brachioradialis (all three of which are flexors). Other muscles in the arm include the pectoralis major, latissimus dorsi, deltoids, and rotator cuffs. In the forearm, there are muscles that control the wrist and fingers. The anterior side contains flexors, while the posterior side has extensors.