Insertion and Origin Points of Shoulder Muscles

1. Supraspinatus

• Origin: Supraspinous fossa of the scapula

• Insertion: Greater tubercle of the humerus

2. Infraspinatus

• Origin: Infraspinous fossa of the scapula

• Insertion: Greater tubercle of the humerus

3. Teres Minor

• Origin: Lateral border of the scapula

• Insertion: Greater tubercle of the humerus

4. Subscapularis

• Origin: Subscapular fossa on the anterior surface of the scapula

• Insertion: Lesser tubercle of the humerus

5. Deltoid (Anterior Head)

• Origin: Lateral third of the clavicle

• Insertion: Deltoid tuberosity of the humerus

6. Deltoid (Middle Fibers)

• Origin: Acromion process of the scapula

• Insertion: Deltoid tuberosity of the humerus

7. Deltoid (Posterior Head)

• Origin: Spine of the scapula

• Insertion: Deltoid tuberosity of the humerus

8. Coracobrachialis

• Origin: Coracoid process of the scapula

• Insertion: Medial surface of the humerus

9. Pectoralis Major

• Origin: Clavicular head from the medial half of the clavicle and the sternocostal head from the sternum and the cartilage of the first six ribs

• Insertion: Lateral lip of the bicipital groove of the humerus

10. Teres Major

• Origin: Inferior angle of the scapula

• Insertion: Medial lip of the bicipital groove of the humerus

11. Latissimus Dorsi

• Origin: Spinous processes of T7-L5, iliac crest, and inferior three or four ribs

• Insertion: Floor of the intertubercular groove of the humerus

12. Serratus Anterior

• Origin: Lateral surfaces of the first eight or nine ribs

• Insertion: Anterior surface of the medial border of the scapula

13. Trapezius (Upper Fibers)

• Origin: Occipital bone and spinous processes of C1-C7

• Insertion: Lateral third of the clavicle

14. Trapezius (Middle Fibers)

• Origin: Spinous processes of T1-T5

• Insertion: Acromion process of the scapula

15. Trapezius (Lower Fibers)

• Origin: Spinous processes of T6-T12

• Insertion: Spine of the scapula

16. Rhomboids Major

• Origin: Spinous processes of T2-T5

• Insertion: Medial border of the scapula

17. Rhomboids Minor

• Origin: Spinous processes of C7-T1

• Insertion: Medial border of the scapula