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The Shoulder

The Shoulder. Label the Shoulder. The shoulder is made up of three bones. _________ – upper arm bone. _______. _________ – shoulder blade. _______. ________ – collar bone. _______. Anatomy of the Shoulder. The head of the humerus fits into a rounded socket in the scapula.

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The Shoulder

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  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 humerusfits 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- LatissiumusDorsi, 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

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