Objective: Recent evidence suggests that shoulder impingement syndrome arises from
primary rotator cuff pathology and may be related to the inability of the rotator cuff to prevent
superior humeral head migration in shoulder elevation. Impingement involves compression
of subacromial structures, including the rotator cuff. Previously, clinical tests have been
shown to be inaccurate in diagnosing rotator cuff impingement. A lack of anatomical validity
might explain the inaccuracy of these tests. This study aimed to clarify the anatomical basis …