11 Questions
What is the angle of the clavicle in the anatomic position?
Approximately 20 degrees posterior to the frontal plane
What is the third kinematic principle of abduction?
The clavicle retracts at the SC joint during full shoulder abduction
How much does the clavicle retract during shoulder abduction?
About 15-20 degrees
Which plane of shoulder abduction results in the greatest clavicle retraction?
Frontal plane
What is the approximate angle of the clavicle in the frontal plane during shoulder abduction?
35 degrees
What is the primary role of the clavicle during shoulder abduction?
To position the scapula in the plane of elevation of the arm
What is the SC joint?
Sternoclavicular joint
What is the GH joint?
Glenohumeral joint
What is the AC joint?
Acromioclavicular joint
What is the position of the clavicle in the anatomic position?
Horizontal
What is the position of the clavicle during shoulder abduction?
Posterior to the frontal plane
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