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Shoulder Instability

Basics Description Because of the shoulder’s extensive ROM, it is prone to instability. The term encompasses a spectrum of disorders of varying degree, direction, and cause. Instability should be distinguished from laxity. Laxity is the symmetric translation of the humeral head over the surface of the glenoid without symptoms. Instability occurs when the degree […]

Shoulder Dislocation

Basics Description The shoulder joint has the greatest ROM of all joints in the body and, thus, is at high risk for dislocations. Shoulder joint stability depends on various dynamic and static anatomical restraints. Dynamic restraints include: Tendon of the long head of the biceps Scapular stabilizers Rotator cuff muscles and tendons Static restraints […]