Joints of the Upper Extremity
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| How many joints are in the shoulder complex? | Four. SC, AC, ScC, GH
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| Which joint is the master joint and why? | Sternoclavicular. Orients the position of the scapula.
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| Fine tune adjustments of scapular movement occurs at what joint? | Acromioclavicular
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| What is scapulohumeral rhythm? | A coupling of shoulder girdle movement with arm movement.
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| What joint are we referring to when we say shoulder joint? | Glenohumeral.
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| Where is the glenohumeral joint located? | Glenoid fossa and the head of the humerus.
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| What major motions are allowed at the GH joint? | Flexion/extension, adduction/abduction, lateral and medial rotation.
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| When is the GH joint in its closed-packed position? | Lateral rotation and abduction.
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| What structure provides stability to the GH joint? | The rotator cuff group of muscles.
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| What are the structural and functional classifications of the GH joint? | Synovial, ball & socket, diarthrotic, triaxial.
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