Movement of the shoulder are composed of three joints and one articulation: the sternoclavicular acromioclavicular, glenohumoral joints, and the scapulothoracic articulation.
Rotator cuff muscles and tendons help move the shoulder but play a more important role in its stabilization.
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Look and compare both sides
look at musculature of trapezius and rhomboids: look for atrophy
extension -45-50%
rotation - keep elbows on side, use both arms and go in and out.
brong hand up to to back of neck.
drop arm test - rotator cuff tears
impingement - wear of tendon against acromion
beer can maneuver
Almost all are from rotator cuff disorders.
Adhesive capsulitis
Osteoarthritis
is very common