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Questions and Answers
What type of joint is the shoulder joint classified as?
Which ligaments are components of the glenoid labrum?
What is the largest bursa within the body associated with the shoulder joint?
Which muscle primarily functions to abduct the arm at the shoulder joint?
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What contributes to the deepening of the articular surface at the shoulder joint?
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Which component helps maintain the position of the clavicle in the shoulder girdle?
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Which imaging modality is best for visualizing the rotator cuff?
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Which of the following muscles is NOT part of the rotator cuff?
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Study Notes
Shoulder Anatomy
- The shoulder is a ball-and-socket joint, the most mobile in the body.
- The shoulder girdle consists of the clavicle, scapula, and humerus.
- Four projections on the scapula serve as attachment points for muscles and ligaments:
- Scapular spine
- Acromion
- Coracoid process
- Glenoid process
Shoulder Labrum and Ligaments
- The glenoid labrum is a fibrocartilaginous ring that deepens the glenoid fossa, the socket for the humeral head.
- The glenohumeral ligaments (three fibrous bands) contribute to the glenoid labrum's formation.
- The coracoacromial ligament protects the humeral head and rotator cuff tendons from trauma.
- The coracoclavicular ligament stabilizes the clavicle.
Shoulder Bursae
- Bursae cushion the tendons and ligaments of the shoulder joint.
- The subacromial-subdeltoid and subscapular bursae are prominent.
- The subacromial-subdeltoid bursa is the largest bursa in the body.
Shoulder Muscles and Tendons
- The deltoid and four rotator cuff muscles provide stability and movement:
- Supraspinatus
- Infraspinatus
- Teres minor
- Subscapularis
- The deltoid muscle's primary function is arm abduction.
- The rotator cuff muscles surround the shoulder joint for stability, abduction, and humerus rotation.
- Oblique coronal MR images provide the best visualization of the rotator cuff muscles.
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Description
This quiz covers the anatomy and physiology of the shoulder, including its joint structure, ligaments, bursae, and associated muscles. Test your knowledge on the components that contribute to the shoulder's mobility and stability. Perfect for students studying anatomy or related fields.
