The muscles of the upper arm that are visible from the outside are the biceps brachii, the triceps brachii, the brachioradialis and the extensor carpi radialus longus. The coracobrachialis and brachialis are deeper upper... More »

Severe pain in the arms and thighs can be caused by muscle overuse and normally is not cause for alarm, notes WebMD. The duration of the symptoms determine whether or not to seek medical attention. More »

Arthritis, tendinitis, rotator cuff injuries, broken bones and pinched nerves are possible causes of upper arm and shoulder pain, says Healthline. Some other causes include dislocation or separation of tendons and ligame... More »

The main muscles of the upper arm include the biceps, brachialis, coracobrachilis, and the triceps. All but the triceps are located in the anterior, or front, compartment of the arm; the triceps is in the posterior compa... More » Science Human Anatomy Muscles

The Clermont College Biology Department lists examples of flexor muscles as the biceps brachii and the hamstrings, and some examples of extensor muscles are the triceps brachii, the quadriceps femoris and the gastrocnemi... More »

The triceps and biceps brachii are both muscles that are found in the arm. The biceps brachii muscle is found in the lower arm, and the triceps brachii muscle is found in the upper arm. More » Science Human Anatomy Muscles

The biceps and triceps muscles are used to bend and extend the arm, while the deltoids are the muscles that lift the arm. When the bicep muscle contracts or flexes, it bends the forearm toward the shoulder. When the tric... More »