What muscles cover the back of the upper forearm and extend the forearms?

The muscles that cover the back of the upper forearm and are responsible for extending the forearm are the triceps. This muscle group consists of three heads—long, lateral, and medial—and is primarily located on the posterior side of the arm. When the triceps contract, they extend the elbow joint, which straightens the forearm and allows for various movements, such as pushing or throwing.

Understanding the function and location of the triceps is vital for anyone studying anatomy or physiology, especially in the context of esthetic practices where knowledge of human musculature is essential. In contrast, the biceps are located at the front of the upper arm and are responsible for flexing the elbow. The deltoids are primarily involved in shoulder movements, and the brachialis, while also important in arm movement, primarily assists in elbow flexion rather than extension.