Ball and socket joints also allow flexion and extension. Flexion of the shoulder joint occurs when the humerus (upper arm) moves forwards from the rest of the body, which happens at the end of an ...

A hinge joint is a type of synovial joint that works like the hinge on a door, allowing bending and straightening only. The shoulder and hip joints are both ball and socket joints. A ball and ...

Significant advancement in the basic science research in the areas of anatomy and biomechanics of the human shoulder has led to the identification of multiple types ... subacromial contact or undue ...

The NIH grant will pay for the creation and testing of a prototype shoulder joint, first in a lab and then in a human cadaver, to verify that the device operates consistently and safely.