The arm extends from the shoulder to the wrist, including the upper arm and forearm. Different muscles may work together in intricate ways to help the arm, wrists, fingers, and hands function. Knowing ...

Posterior shoulder dislocation occurs when the top of the upper arm bone, known as the humerus, moves backward out of its socket. This causes pain, muscle spasms, and a limited range of motion. The ...

Strengthening your shoulder muscles with exercises like bent-over row and mountain climbers can help you gain definition and maintain mobility.

The following is an excerpt from the new Men's Health training guide 90-Day Transformation Challenge: Arms. In one volume, you'll get all the tools you need—information, a nutrition guide, and ...

A supracondylar fracture is a type of elbow fracture common in young children. The location and cause of the fracture determine the type. A supracondylar fracture is a fracture in the upper arm just ...

a, b, Comparison of the anatomy of the pectoral limb endoskeleton (a) and humerus (b) of stem-tetrapod fish (Panderichthys, Tiktaalik and Elpistostege) and an early tetrapod (Tulerpeton).