subakromiale

Subakromiale (subacromial space) refers to the region located beneath the acromion of the shoulder. It is bounded superiorly by the acromion and the coracoacromial arch and inferiorly by the head of the humerus and the rotator cuff tendons. The subacromial space contains the subacromial (subdeltoid) bursa and portions of the rotator cuff tendons, most notably the supraspinatus tendon, which together facilitate smooth movement of the shoulder structures.

The subacromial space serves to reduce friction between the overlying acromion and accompanying structures and the underlying rotator cuff tendons during arm elevation. Changes in the size or integrity of this space can lead to impingement and pain, particularly in overhead activities.

Common conditions affecting the subacromial region include subacromial impingement syndrome, subacromial bursitis, and rotator cuff tendinopathy, often in association with calcific tendinopathy. Impingement arises when the space is narrowed or structures within it become irritated, especially during arm elevation.

Diagnosis relies on clinical examination and imaging. Physical tests such as the Neer test, Hawkins-Kennedy test, and the painful arc are used to assess impingement. Imaging options include ultrasound and MRI for soft tissue evaluation, and X-ray to assess bony contributors like acromial shape or osteophytes.

Treatment is typically conservative, starting with activity modification, physical therapy focusing on scapular stabilization and rotator cuff strengthening, NSAIDs, and subacromial corticosteroid injections. If symptoms persist, surgical options such as arthroscopic subacromial decompression or acromioplasty may be considered to enlarge the subacromial space.