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Kin Ch 9

Joints of the Upper Extremity

How many joints are in the shoulder complex? Four. SC, AC, ScC, GH
Which joint is the master joint and why? Sternoclavicular. Orients the position of the scapula.
Fine tune adjustments of scapular movement occurs at what joint? Acromioclavicular
What is scapulohumeral rhythm? A coupling of shoulder girdle movement with arm movement.
What joint are we referring to when we say shoulder joint? Glenohumeral.
Where is the glenohumeral joint located? Glenoid fossa and the head of the humerus.
What major motions are allowed at the GH joint? Flexion/extension, adduction/abduction, lateral and medial rotation.
When is the GH joint in its closed-packed position? Lateral rotation and abduction.
What structure provides stability to the GH joint? The rotator cuff group of muscles.
What are the structural and functional classifications of the GH joint? Synovial, ball & socket, diarthrotic, triaxial.
Created by: Femura on 2010-09-15

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