Shoulder Anatomy Quiz
Questions: 16 · 10 minutes
1. Which structures meet at the acromioclavicular joint?
The coracoid process and the medial end of the clavicle
The acromion and the head of the humerus
The acromion and the lateral end of the clavicle
The glenoid cavity and the lateral end of the clavicle
2. A person has particular difficulty initiating the first part of arm abduction. Which muscle is most directly associated with initiating this movement?
Middle deltoid
Supraspinatus
Latissimus dorsi
Pectoralis major
3. Which muscle is not part of the rotator cuff?
Subscapularis
Teres minor
Supraspinatus
Teres major
4. A muscle arises from the infraspinous fossa, inserts on the greater tubercle of the humerus, and externally rotates the arm. Which muscle is it?
Infraspinatus
Supraspinatus
Teres major
Subscapularis
5. Which muscle has a proximal attachment on the coracoid process of the scapula?
Short head of the biceps brachii
Long head of the triceps brachii
Middle fibers of the deltoid
Long head of the biceps brachii
6. As the arm continues toward an overhead position, which scapular movement is necessary to help orient the glenoid cavity upward?
Anterior tilting without rotation
Downward rotation
Upward rotation
Elevation without rotation
7. The spine of the scapula expands laterally to form which structure?
The coracoid process
The acromion
The supraglenoid tubercle
The lesser tubercle
8. With the shoulder abducted and externally rotated, which ligament complex is an especially important static restraint against anterior translation of the humeral head?
Inferior glenohumeral ligament complex
Transverse humeral ligament
Superior transverse scapular ligament
Coracoacromial ligament
9. After an anterior shoulder dislocation, a person notices numbness over the lateral deltoid region. Which nerve should be assessed particularly carefully?
Median nerve
Long thoracic nerve
Ulnar nerve
Axillary nerve
10. Which rotator cuff muscle is primarily associated with internal rotation of the humerus?
Supraspinatus
Infraspinatus
Subscapularis
Teres minor
11. What is the main anatomical contribution of the glenoid labrum?
It connects the clavicle directly to the humerus
It produces most of the force for arm abduction
It separates the acromioclavicular joint into two cavities
It deepens the glenoid socket and increases contact with the humeral head
12. During arm elevation, narrowing beneath the coracoacromial arch most directly threatens which rotator cuff tendon as it passes under the acromion?
Supraspinatus tendon
Teres minor tendon
Subscapularis tendon
Infraspinatus tendon
13. When a person pushes against a wall, the medial border of the scapula protrudes prominently. Injury to which nerve classically produces this pattern?
Dorsal scapular nerve
Upper subscapular nerve
Thoracodorsal nerve
Long thoracic nerve
14. A fracture at the surgical neck of the humerus is followed by reduced sensation over the lateral shoulder and weakened deltoid function. Which nerve is most likely involved?
Musculocutaneous nerve
Axillary nerve
Suprascapular nerve
Radial nerve
15. Which bursa lies between the supraspinatus tendon and the overlying acromion-deltoid region, helping reduce friction during elevation of the arm?
Subcoracoid bursa
Scapulothoracic bursa
Subacromial-subdeltoid bursa
Olecranon bursa
16. Which two surfaces form the glenohumeral joint?
The head of the humerus and the acromion of the scapula
The head of the humerus and the glenoid cavity of the scapula
The lateral clavicle and the glenoid cavity of the scapula
The humeral trochlea and the glenoid cavity of the scapula