The Rotator Cuff
Four tendons provide stability holding the humeral head into the glenoid and provide a fulcrum around which the shoulder muscles can move the ball and socket.
- Supraspinatus – helps lift or abduct the shoulder
- Infraspinatus – helps lift and externally rotate the shoulder
- Teres Minor – helps externally rotate the shoulder
- Subscapularis – helps internally rotate the shoulder