Subacromial bursa

Subacromial bursa is a significant anatomical structure in the shoulder joint. It is a fluid-filled sac that acts as a cushion between the acromion and the rotator cuff tendons. The term "subacromial" is derived from Latin, with "sub" meaning under and "acromion" referring to the outermost part of the shoulder blade.

Anatomy

The subacromial bursa is located beneath the acromion, a bony projection off the scapula. It lies superior to the supraspinatus muscle, one of the four muscles that make up the rotator cuff. The bursa is filled with synovial fluid, which provides lubrication and reduces friction between the acromion and the rotator cuff tendons during shoulder movements.

Function

The primary function of the subacromial bursa is to prevent friction between the acromion and the rotator cuff tendons. It allows smooth, pain-free movement of the shoulder joint. The bursa also plays a role in distributing nutrients to the supraspinatus tendon.

Clinical significance

Inflammation of the subacromial bursa, known as bursitis, can cause significant shoulder pain and restricted movement. This condition is often associated with other shoulder pathologies such as rotator cuff tendinitis and impingement syndrome. Treatment options for subacromial bursitis include rest, physical therapy, non-steroidal anti-inflammatory drugs (NSAIDs), and in severe cases, surgery.

See also

• Bursa (anatomy)
• Shoulder joint
• Rotator cuff

References

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