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About Dynamic Stability Factors of Glenohumeral (Shoulder) Joint

What is Glenohumeral (Shoulder) Stability?

Glenohumeral (Shoulder) stability is mainly achieved through dynamic factors. Active contraction of the rotator cuff contributes to joint stabilization by coordinated muscular activity and by secondary tightening of the ligamentous constraints. This effect works in combination with the concavity-compression mechanism, in which muscle contraction causes compression of nearly congruent articular […]

Shoulder Impingement Syndrome

Basics Description Shoulder pain with overhead activities is a common musculoskeletal complaint. Impingement syndrome: Inflammatory condition of the soft tissues of the subacromial space Most common cause of presentation for shoulder complaints to a physician’s office (>50% of all shoulder complaints) Represents a continuum, progressing from acute bursitis, to chronic bursitis, to partial-thickness tears […]

Biomechanics of Shoulder Stability (Static Stability Factor)

The glenohumeral (shoulder) joint is inherently unstable, with the large humeral head articulating with the small and shallow glenoid. Static stability is provided by the orientation of the articular surfaces, the articular conformity of humerus and the glenoid, the glenoid labrum, the negative intra-articular pressure, the adhesion-cohesion of synovial joint fluid, and the glenohumeral joint […]

Anterior Shoulder Dislocation

SYMPTOMS

There is acute onset of localised swelling and pain over the anterior part of the shoulder with deformation, after an excessive external rotation and abduction trauma. This is the most common type of dislocation in sports (85-90 per cent). Movements of the arm cause pain and the patient will protect the arm in […]