Introduction Shoulder impingement syndrome (SIS) is the mechanical entrapment of the supraspinatus tendon underneath the ... was believed as one of the main contributing factors of SIS. Scapular ...

There are four major players to know, including: Supraspinatus Infraspinatus ... focusing on the three heads that comprise the shoulder muscles, including the anterior, lateral and posterior ...

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The aim of this study was to compare histological muscle changes in partial-thickness to full-thickness tears of the supraspinatus tendon. Methods Muscle biopsies of nine partially torn and 15 fully ...