Infraspinatus
Rotator cuff muscle · Shoulders
- Origin
- Infraspinous fossa of the scapula
- Insertion
- Greater tubercle of the humerus (middle facet)
- Action
- Laterally rotates the arm and stabilises the shoulder joint
The main external rotator of the shoulder and part of the rotator cuff. Band and cable external rotations train it directly; it also works in face pulls.