1. The Shoulder

2. Label the Shoulder  The shoulder is made up of three bones _______  _________ – upper arm bone  _________ – shoulder blade  ________ – collar bone

3. Anatomy of the Shoulder  The head of the humerus fits into a rounded socket in the scapula  A combination of muscles and tendons keeps the humerus centered in the socket

4. The Shoulder Girdle  The muscles of the shoulder girdle act on the _________, primarily to ___________ it.  There are ____ major muscles that anchor the scapula. –Four posterior muscles (T_________, R_________ Major, ___________ Minor, L__________ S____________) –Two anterior muscles (P___________ Minor, S____________ A_________)

5. The Shoulder Girdle Since the scapula has _________ _____________with the rib cage it essentially _________ The main function of the shoulder girdle muscles is to _______ the scapula When the scapula is ______________ it serves as a point of ________ for the muscles of the _____________ (upper arm bone)

6. Posterior Muscles of the Shoulder Girdle

7. Anterior Muscles of the Shoulder Girdle

8. Major Muscles That Act at the Shoulder Girdle

9. The Shoulder  The shoulder joint is the most mobile joint in the body.  There are a total of ____ muscles that cross the shoulder joint (inserting on the humerus). –_____ muscles originate from each scapula. S____________, I___________, S___________, T______ Minor, T_______ Major, D__________ and C____________ –___ muscles originate from the axial skeleton (no attachment on the scapula). P__________ Major, L____________ D_______

10. The Shoulder Anterior Deltoid and Pectoralis Major

11. The Shoulder- Latissiumus Dorsi, Pectoralis Major and Deltoid, Lateral View

12. The Shoulder – Posterior Muscle of the Shoulder Joint

13. The Rotator Cuff  _____ of the muscles that act at the shoulder are commonly called the R______ C______.  The rotator cuff’s primary stabilizing function is to hold the ________ head in the _______ ________ to prevent _________ (dislocation).  The muscles of the rotator cuff can be remembered using the acronym SITS: –S__________ –I___________ –T_______ M______ –S____________

14. The Rotator Cuff – Anterior View

15. The Rotator Cuff – Posterior View

16. Coracobrachialis

17. Major Muscles That Act at the Shoulder