- See
Rotator cuff:
- anatomy:
- origin: middle half of the lateral scapular border;
- insertion: inferior aspect of greater tuberosity of the humerus, capsule of shoulder joint;
- action:
- lateral rotation of humerus at the shoulder (responsible for 45% of power of external rotation);
- aids in adduction and extension of humerus;
- stabilization of head of humerus;
- reversed origin insertion action: when the humerus is stabilized, abducts the inferior angle of the scapula;
- synergists: infraspinatus,
subscapularis;
- nerve supply: axillary, C4,
C5,
C6;
- helps form the
triangular space &
quadrangular space;
- w/ isolated teres minor atrophy consider
quadrilateral space syndrome;
