So, when a person wants to move their arm or do something else, one or more of the muscles engage to perform the action. The anterior compartment of the upper arm refers to the part of the arm ...

Inside each compartment are layers of muscles that run from deep inside your arm to near the surface of your skin. The anterior compartment has three layers of muscle: superficial (closest to ...

adds bulk to your appearance and defines the top part of the arm. The deltoid muscle has three parts: the anterior, the medial/lateral, and the posterior. All three portions play a key role in ...

Its main purpose is to help you lift and rotate your arm. The deltoid muscle has three parts: anterior, lateral, and posterior. These muscles all work together to keep your shoulders stable.

Common causes of serratus anterior ... arm. These issues can also make it difficult to lift your arm overhead or have a normal range of motion with the arm and shoulder. You may experience: Most ...

Trying to figure out which muscles are worked by a bench press? The popular gym move mainly works three areas of the body: chest, shoulders and arms ... The serratus anterior is a fan-shaped ...