+Acromion types Type Appearance Prevalence Angle ofanterior slope Flat 90px 17.1% 13.18 Curved 90px 42.9% 29.98 Hooked 90px 39.3% 26.98 When the arm is raised, the subacromial space (gap between the anterior edge of the acromion and the head of the humerus) narrows; the supraspinatus muscle tendon passes through this space. Anything that causes further narrowing has the tendency to impinge the tendon and cause an inflammatory response, resulting in<unk>  syndrome. Such causes can be bony structures such as subacromial spurs (bony projections from the acromion), osteoarthritic spurs on the acromioclavicular joint, and variations in the shape of the acromion. Thickening or calcification of the coracoacromial ligament can also cause<unk> . Loss of function of the rotator cuff muscles, due to injury or loss of strength, may cause the humerus to move superiorly, resulting in<unk> . Inflammation and subsequent thickening of the subacromial bursa may also cause<unk> . Weight training exercises where the arms are elevated above shoulder height but in an internally rotated position such as the upright row have been suggested as a cause of subacromial<unk> . Another common cause of<unk>  syndrome is restrictions in the range movement of the scapulo-thoracic surfaces. Commonly, one or more ribs between rib 2 and rib 7/8 on the side of the<unk>  may jut out slightly and/or feel hard when the person springs on it or them. When this occurs, the scapula is raised and anteverted (angled forwards). This in turn pushes the acromion and the humeral head out of its usual anatomical position placing pressure downwards at the head of the humerus at the position of the nerve thus causing the<unk>  syndrome. This is visibly demonstrated by a slightly raised and protracted shoulder girdle. Note: the humerus anteverts in this position causing a more protrusive section of the humerus to press upwards towards the acromion.
Shoulder impingement syndrome
Rotator cuff tear
Facet syndrome
Snapping hip syndrome
Epicondylitis
Patellar subluxation syndrome
Patellofemoral pain syndrome
Milwaukee shoulder syndrome