Abduction of shoulder – movement of the arm out to the side away from the body
Acromioclavicular joint (ACJ) – small joint at the top of the shoulder between the acromion and the clavicle.
Acromion – a projection of bone from the shoulder blade which you can feel as the flat bit of bone at the top of the shoulder.
Active Exercise – exercise for rehabilitation where the muscles of the affected limb are used to do the movement.
Adduction of shoulder – movement of the arm toward the center of the body.
Adhesive capsulitis – another term for frozen shoulder. A condition which causes pain and stiffness due to inflammation of the shoulder capsule.
Anatomical Shoulder Replacement – a form of shoulder replacement where the basic anatomy of the join is maintained ie: the ball is replaced with a metal ball and the socket is replaced with a plastic socket.
Arthritis – destruction of the cartilage of a joint resulting in pain and loss of movement. This may have several causes.
Arthroplasty – another term for joint replacement
Arthroscopy – keyhole surgery involving a joint such as the shoulder or elbow
Atraumatic shoulder instability – instability of the shoulder that is not caused by trauma or injury. This is usually a result of stretchy tissues or abnormally behaving shoulder muscles. Read more here.