Scapula Region
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22 Terms
What ligament forms the roof of the subacromial space?
The coracoacromial ligament forms the roof of the subacromial space.
What is the function of the coracoacromial ligament?
It forms a protective arch over the subacromial space.
When is the coracohumeral ligament most taut?
When the arm is hanging by the side.
What ligaments reinforce the anterior portion of the glenohumeral joint capsule?
The superior, middle, and inferior glenohumeral ligaments.
When is the superior glenohumeral ligament taut?
When the arm is resting at the side.
When is the middle glenohumeral ligament taut?
When the humeral head translates anteriorly.
When is the inferior glenohumeral ligament taut?
When the arm is overhead.
What ligaments support the AC joint?
The AC ligaments, coracoacromial ligament, and coracoclavicular ligaments (trapezoid and conoid).
Which rotator cuff muscle inserts on the superior facet of the greater tubercle?
Supraspinatus.
Which rotator cuff muscle inserts on the middle facet of the greater tubercle?
Infraspinatus.
Which rotator cuff muscle inserts on the inferior facet of the greater tubercle?
Teres Minor.
Which rotator cuff muscle inserts on the lesser tubercle?
Subscapularis.
What structure inserts on the medial lip of the intertubercular groove?
Teres Major.
What other terms may be used for the lip of the intertubercular groove?
Lip, ridge, and crest.
Where does the long head of the biceps tendon attach?
The supraglenoid tubercle and the labrum.
What is the function of the subacromial/subdeltoid bursa?
It cushions between the humeral head and acromion during overhead movement.
Why is the subacromial/subdeltoid bursa important?
It reduces friction and acts as a buffer during arm elevation.
Why is the supraspinatus tendon commonly involved in subacromial pain syndrome?
It passes through the subacromial space and may become compressed during overhead activity.
Why are protraction and retraction preferred terms for scapular movement?
The scapula sits approximately 30 to 35 degrees anterior to the frontal plane.
At what vertebral level is the superior angle of the scapula located?
T2.
At what vertebral level is the spine of the scapula located?
T4.
At what vertebral level is the inferior angle of the scapula located?
T7 to T8.