Advanced Elbow Joint Quiz

Q1. Which part of the ulnar collateral ligament is the principal restraint to valgus stress at the elbow?

• Anterior bundle
• Transverse bundle only
• Posterior bundle only
• Annular ligament

Q2. The anterior bundle of the ulnar collateral ligament extends from the medial epicondyle primarily to which ulnar landmark?

• Supinator crest
• Sublime tubercle of the coronoid process
• Ulnar styloid process
• Radial notch

Q3. What is the most common direction of elbow dislocation?

• Superior
• Posterior or posterolateral
• Directly medial only
• Directly anterior

Q4. Which three injuries classically constitute the terrible triad of the elbow?

• Humeral shaft fracture, radial shaft fracture, and elbow dislocation
• Medial epicondyle fracture, clavicle fracture, and radial head dislocation
• Olecranon fracture, scaphoid fracture, and ulnar styloid fracture
• Elbow dislocation, radial head fracture, and coronoid fracture

Q5. Why is the coronoid process important for elbow stability?

• It forms the lateral border of the cubital fossa
• It forms an anterior bony buttress against posterior displacement
• It forms the primary attachment of the triceps tendon
• It articulates directly with the capitulum

Q6. Which ligamentous complex is particularly important in resisting posterolateral rotatory instability of the elbow?

• Lateral collateral ligament complex
• Ulnar collateral ligament alone
• Interosseous membrane alone
• Transverse humeral ligament

Q7. A displaced supracondylar fracture of the humerus near the elbow can particularly threaten which artery?

• Posterior circumflex humeral artery
• Thoracoacromial artery
• Brachial artery
• Subclavian artery

Q8. What is cubitus valgus?

• An abnormally decreased carrying angle with medial deviation only
• An abnormally increased carrying angle
• Posterior dislocation of the radial head
• Fixed pronation of the forearm

Q9. What is cubitus varus?

• A decreased or reversed carrying angle
• A rupture of the annular ligament
• A fracture of the radial head
• An excessive lateral carrying angle

Q10. Which description best summarizes the functional stability of the elbow joint?

• The elbow is stabilized only by the biceps and triceps tendons
• The elbow has little bony stability and depends entirely on skin and fascia
• Stability depends entirely on the annular ligament
• Bony congruity, ligaments, capsule, and muscular stabilizers work together to maintain stability