Intermediate Radial Nerve Quiz

Q1. What is the relationship of the radial nerve to the axillary artery before the nerve enters the posterior arm?

• Anterior to pectoralis major
• Within the axillary artery
• Posterior to the axillary artery
• Entirely medial to the axillary vein

Q2. Between which heads of triceps brachii does the radial nerve initially pass as it enters the posterior arm?

• Long and medial heads
• Lateral and short heads
• Long and short heads
• Medial and short heads

Q3. Which structure does the radial nerve pierce to move from the posterior compartment toward the anterior aspect of the distal arm?

• Medial intermuscular septum
• Interosseous membrane
• Flexor retinaculum
• Lateral intermuscular septum

Q4. Between which muscles does the radial nerve descend near the lateral side of the distal arm?

• Biceps brachii and coracobrachialis
• Brachialis and brachioradialis
• Pronator teres and flexor carpi radialis
• Triceps brachii and flexor carpi ulnaris

Q5. Which muscle may receive a radial nerve contribution to its lateral portion despite being primarily supplied by the musculocutaneous nerve?

• Biceps brachii
• Brachialis
• Coracobrachialis
• Pronator teres

Q6. Which cutaneous branch of the radial nerve supplies skin over the posterior arm?

• Lateral cutaneous nerve of the forearm
• Posterior cutaneous nerve of the arm
• Palmar cutaneous branch
• Medial cutaneous nerve of the forearm

Q7. Which radial nerve branch supplies skin over part of the posterior forearm?

• Posterior cutaneous nerve of the forearm
• Dorsal cutaneous branch of the ulnar nerve
• Anterior interosseous nerve
• Palmar cutaneous branch of the median nerve

Q8. Near the lateral epicondyle, the radial nerve typically divides into which two terminal branches?

• Medial and lateral cutaneous branches
• Anterior and posterior interosseous nerves
• Superficial and deep branches
• Palmar and recurrent branches

Q9. What is the principal role of the superficial branch of the radial nerve?

• Motor supply to thenar muscles
• Motor supply to triceps brachii
• Cutaneous sensation
• Motor supply to interossei

Q10. What happens to the deep branch of the radial nerve after it passes through the supinator?

• It becomes the anterior interosseous nerve
• It becomes the lateral cutaneous nerve of the forearm
• It joins the ulnar nerve
• It continues as the posterior interosseous nerve