Advanced Common Interosseous Artery Quiz

Q1. Which relationship best distinguishes the two principal terminal branches of the common interosseous artery?

• One supplies only the arm and the other only the shoulder
• Both remain entirely superficial to the forearm fascia
• Both travel through the carpal tunnel
• One descends anterior to the interosseous membrane while the other enters the posterior forearm

Q2. Which artery provides a route from the common interosseous system into the collateral circulation around the posterior elbow?

• Anterior circumflex humeral artery
• Princeps pollicis artery
• Interosseous recurrent artery
• Superficial palmar branch

Q3. The interosseous recurrent artery most characteristically communicates with which branch of the profunda brachii artery?

• Superior ulnar collateral artery
• Inferior ulnar collateral artery
• Anterior circumflex humeral artery
• Middle collateral artery

Q4. Which artery and nerve form an important neurovascular pair on the anterior surface of the interosseous membrane?

• Posterior interosseous artery and ulnar nerve
• Ulnar artery and superficial radial nerve
• Radial artery and median nerve
• Anterior interosseous artery and anterior interosseous nerve

Q5. Which muscle is supplied by the anterior interosseous artery near the distal forearm and lies directly anterior to the interosseous membrane?

• Extensor carpi radialis longus
• Brachioradialis
• Anconeus
• Pronator quadratus

Q6. What happens to the anterior interosseous artery near the proximal border of pronator quadratus?

• It terminates in the medial epicondyle
• It becomes the brachial artery
• It supplies pronator quadratus and contributes to the dorsal carpal network
• It enters the carpal tunnel with the median nerve

Q7. An anatomical variation involving a persistent median artery may be associated with which arterial system in the forearm?

• Dorsal scapular system only
• Ulnar or interosseous arterial system
• Posterior circumflex humeral system only
• Thoracoacromial system only

Q8. Why is knowledge of common interosseous artery variation important during forearm surgery?

• The artery has no relationship to deep forearm structures
• The artery is absent in all adults
• Variable branching can alter the location and caliber of vessels at risk
• The artery always lies within the radius

Q9. Occlusion of the common interosseous artery would most directly threaten blood flow through which pair of vessels?

• Superior and inferior ulnar collateral arteries
• Anterior and posterior interosseous arteries
• Radial and ulnar arteries
• Anterior and posterior circumflex humeral arteries

Q10. Which description best summarizes the common interosseous artery?

• A branch of the profunda brachii artery that terminates in the arm
• A short ulnar branch giving rise to major arteries of the deep anterior and posterior forearm
• A superficial branch of the radial artery confined to the hand
• A terminal branch of the axillary artery supplying only the shoulder