Article

Shoulder impingement is a common condition presumed to contribute to rotator cuff
disease. Impingement can occur externally with the coracoacromial arch or
internally with the glenoid rim. Normal scapulothoracic motions that occur during
arm elevation include upward rotation, posterior tilting, and either internal or
external rotation. These scapulothoracic motions and positions are the result of
coupled interactions between sternoclavicular and acromioclavicular joints.
The sternoclavicular and acromioclavicular joints both contribute to scapulothoracic
upward rotation. Posterior tilting is primarily an acromioclavicular joint
motion. The sternoclavicular and acromioclavicular joint motions offset one
another regarding final scapulothoracic internal/external rotation position. This
manuscript discusses these coupled interactions in relation to shoulder muscle
function. Two case examples are presented to demonstrate application of
understanding these interactions and potential mechanisms of movement
abnormalities in targeting treatment interventions for movement based subgroups
of impingement patients.
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Langue : ANGLAIS