range of movements of the shoulder. Movements Flexion and extension of the shoulder joint in the (sagittal plane). Flexion is carried out by the anterior fibres of the deltoid, pectoralis major and the coracobrachialis. Extension is carried out by the latissimus dorsi and posterior fibres of the deltoid. Abduction and adduction of the shoulder (frontal plane). Abduction is carried out by the deltoid and the supraspinatus in the first 90 degrees. From 90-180 degrees it is the trapezius and the serratus anterior. Adduction is carried out by the pectoralis major, latissimus dorsi, teres major and the subscapularis. Horizontal abduction and horizontal adduction of the shoulder (transverse plane) Medial and lateral rotation of the shoulder (also known as internal and external rotation). Medial rotation is carried out by the anterior fibres of the deltoid, teres major, subscapularis, pectoralis major and the latissimus dorsi. Lateral rotation is carried out by the posterior fibres of the deltoid, infraspinatus and the teres minor. Circumduction of the shoulder (a combination of flexion/extension and abduction/adduction). Clinical significance The capsule can become inflamed and stiff, with abnormal bands of tissue (adhesions) growing between the joint surfaces, causing pain and restricting the movement of the shoulder, a condition known as frozen shoulder or adhesive capsulitis. A SLAP tear (superior labrum anterior to posterior) is a rupture in the glenoid labrum. SLAP tears are characterized by shoulder pain in specific positions, pain associated with overhead activities such as tennis or overhand throwing sports, and weakness of the shoulder. This type of injury often requires surgical repair. Anterior dislocation of the glenohumeral joint occurs when the humeral head is displaced in the anterior direction. Anterior shoulder dislocation often is a result of a blow to the shoulder while the arm is in an abducted position. In younger people, these dislocation events are most commonly associated with fractures on the humerus and/or glenoid and can lead to recurrent instability. In older people, recurrent instability is rare but people often suffer rotator cuff tears. It is not uncommon for the arteries and nerves (axillary nerve) in the axillary region to be damaged as a result of a shoulder dislocation; which if left untreated can result in weakness, muscle atrophy, or paralysis. Subacromial bursitis is a painful condition caused by inflammation which often presents a set of symptoms known as subacromial impingement. Arthrography of shoulder joint (with or without computed tomography) is performed