Rotator cuff muscles

1. D R N A V E E D K H A L I D
Rotator Cuff Muscles

2. SItS

6. Supraspinatus:
 originates above the spine of the shoulder blade from
supraspinatus fossa
 inserts on the greater tuberosity of the humerus.
 Innervation : Suprascapular nerve

8. Infraspinatus
 originates below the spine of the scapula, in the
infraspinatus fossa,
 inserts on the posterior aspect of the greater
tuberosity of the humerus.
 Innervation : Suprascapular nerve

10. Teres minor
 originates on the lateral border of scapula
 inserts on the greater tuberosity of the humerus.
 Innervation : Axillary nerve

12. Subscapularis
 originates on the anterior surface of the scapula from
subscapularis fossa
 inserts on the lesser tuberosity of the humerus
 Innervation :
 Upper and lower subscapular nerves

14. Function
 Each rotator cuff muscle performs a specific and
important function for your shoulder joint

15. Stabilizing the head of the humerus in the
shoulder joint
 The supraspinatus, infraspinatus, teres minor, and
subscapularis muscles all work together to achieve
this

16. Abducting or elevating the shoulder
joint out to the side
 These motions are performed by the supraspinatus.

17. Externally rotating the shoulder joint
 The infraspinatus and teres minor muscles are
responsible for this movement

18. Depressing the head of the humerus
 The subscapularis muscle performs this additional
function to allow the humerus to move freely in the
shoulder joint during the elevation of the arm

20. Thank You !