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Published byAndra Casey Modified over 8 years ago
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The Shoulder
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Label the Shoulder The shoulder is made up of three bones _______ _________ – upper arm bone _________ – shoulder blade ________ – collar bone
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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
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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_________)
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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)
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Posterior Muscles of the Shoulder Girdle
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Anterior Muscles of the Shoulder Girdle
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Major Muscles That Act at the Shoulder Girdle
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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_______
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The Shoulder Anterior Deltoid and Pectoralis Major
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The Shoulder- Latissiumus Dorsi, Pectoralis Major and Deltoid, Lateral View
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The Shoulder – Posterior Muscle of the Shoulder Joint
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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____________
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The Rotator Cuff – Anterior View
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The Rotator Cuff – Posterior View
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Coracobrachialis
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Major Muscles That Act at the Shoulder
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