QuestionSBA
QuestionChoice
The acromioclavicular joint is not involved in shoulder abduction.
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c
Acromioclavicular joint
QuestionChoice
The glenohumeral and scapulothoracic joints move in a 2:1 ratio after the first 30 degrees of abduction.
10007167
b
Scapulothoracic joint
QuestionChoice
After 30 degrees, shoulder abduction is performed by both the glenohumeral joint and the scapulothoracic joint. The glenohumeral joint is responsible for the majority of shoulder abduction, while the scapulothoracic joint contributes to a lesser extent by rotating the scapula to create more room for the arm to move. However, the first 30 degrees of abduction is performed by the glenohumeral joint.
10007170
e
Scapulothoracic joint
QuestionChoice
The sternoclavicular joint is not involved in shoulder abduction.
10007169
d
Sternoclavicular joint
QuestionChoice
The first 30 degrees of shoulder abduction is performed by the glenohumeral joint. The glenohumeral joint is responsible for the majority of shoulder abduction at all degrees of motion.
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a
Glenohumeral joint
Concept
Chapter
2693
3966
Muscle physiology
Topic
183
Physiology & Pathology of Bone
13980
A 55-year-old woman presents to her GP with six months of shoulder pain that is worse on movement. It is interfering with her work as a painter and decorator.

On examination, the pain is localised to her right shoulder joint, and is experienced during the first 30 degrees of abduction.

Which of the following joints performs the first 30 degrees of abduction?
a