Syndrome involves rotator cuff tendonitis in subacromial space beneath acromion. Main symptoms include pain, weakness, and loss of shoulder movement. Pain worsens with overhead movement and at night. Range of motion limited, especially during arm elevation
Inflammation of bursa between supraspinatus tendon and shoulder structures. Most commonly arises from shoulder impingement symptoms. Primary causes include autoimmune conditions and crystal deposition disorders
Rotator cuff tendinopathy is the most common cause of shoulder pain. Tears can be acute traumatic or chronic degenerative. Most people develop rotator cuff tendinopathy within their lifetime
Levator scapulae are two large muscles located along upper back and neck. Originates from C1-C4 vertebrae and attaches to scapula's inner top edge. Elevates shoulder blades and rotates them downward. Participates in neck side bending and rotation movements
Deltoid is main shoulder muscle, triangle-shaped and connects to clavicle, scapula, and humerus. Muscle enables abduction, flexion, extension, and rotation of upper arm. Three heads: anterior, lateral, and posterior, each with specific movements
Shoulder pain can range from mild to severe and occur suddenly or gradually. Rotator cuff problems are most common outside shoulder, causing pain with reaching. Frozen shoulder leads to constant joint stiffness and decreased range of motion. Biceps tendon problems commonly cause pain at front of shoulder. Shoulder instability and dislocation can cause pain all over shoulder