Table of Contents
The rotator cuff comprises four scapular muscles that stabilize the ⚙️ Glenohumeral Joint and move the 🦴 humerus.
Muscles
- 💪
Supraspinatus
- Origin: Supraspinous fossa of the 🦴 Scapula
- Insertion: Superior facet of the greater tubercle of the 🦴 humerus
- Action: Abducts the 🦴 humerus; stabilizes the ⚙️ Glenohumeral Joint
- 💪
Infraspinatus
- Origin: Infraspinous fossa of the 🦴 Scapula
- Insertion: Middle facet of the greater tubercle of the 🦴 humerus
- Action: Laterally rotates the 🦴 humerus; stabilizes the ⚙️ Glenohumeral Joint
- 💪
Teres Minor
- Origin: Lateral border of the 🦴 Scapula
- Insertion: Inferior facet of the greater tubercle of the 🦴 humerus
- Action: Laterally rotates and assists adduction of the 🦴 humerus; stabilizes the ⚙️ Glenohumeral Joint
- 💪
Subscapularis
- Origin: Subscapular fossa (anterior 🦴 Scapula)
- Insertion: Lesser tubercle of the 🦴 humerus
- Action: Medially rotates and adducts the 🦴 humerus; stabilizes the ⚙️ Glenohumeral Joint