| Muscle | Origin | Attachment | Function | Innervation |
|---|---|---|---|---|
| Supraspinatus | Supraspinous fossa | Superior aspect of greater tubercle | Abduction (primarily <15°) | Suprascapular nerve (C4-C6) |
| Infraspinatus | Infraspinous fossa | Posterolateral aspect of greater tubercle | External rotation | Suprascapular nerve (C4-C6) |
| Teres minor | Lateral border of scapula | Posterolateral aspect of greater tubercle | Adduction & External rotation | Axillary nerve (C5-C6) |
| Subscapularis | Subscapular fossa | Lesser tubercle | Adduction & Internal rotation | Upper & lower subscapular nerve (C5-C6) |
