Radial nerve anatomy test

Evaluate the knowledge of radial nerve anatomy. The test assesses its topography, branches, target muscles, and areas of sensory innervation.

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1. From which trunk of the brachial plexus does the radial nerve originate?

Lateral

The radial nerve is a direct continuation of the posterior cord of the brachial plexus.
Medial

The radial nerve is a direct continuation of the posterior cord of the brachial plexus.
Posterior

The radial nerve is a direct continuation of the posterior cord of the brachial plexus.
Anterior

The radial nerve is a direct continuation of the posterior cord of the brachial plexus.
I find it difficult to answer

The radial nerve is a direct continuation of the posterior cord of the brachial plexus.

2. Through which canal in the arm does the radial nerve pass?

Humeromuscular canal

The radial nerve courses in the spiral (humeromuscular) canal between the humerus and the heads of the triceps muscle.
Carpal canal

The radial nerve courses in the spiral (humeromuscular) canal between the humerus and the heads of the triceps muscle.
Ulnar nerve canal

The radial nerve courses in the spiral (humeromuscular) canal between the humerus and the heads of the triceps muscle.
Supinator canal

The radial nerve courses in the spiral (humeromuscular) canal between the humerus and the heads of the triceps muscle.
I find it difficult to answer

The radial nerve courses in the spiral (humeromuscular) canal between the humerus and the heads of the triceps muscle.

3. Which artery accompanies the radial nerve in the brachial canal?

Brachial artery

In the humeromuscular canal, the radial nerve travels together with the deep brachial artery.
A. collateralis ulnaris superior

In the humeromuscular canal, the radial nerve travels together with the deep brachial artery.
A. recurrens radialis

In the humeromuscular canal, the radial nerve travels together with the deep brachial artery.
Deep brachial artery

In the humeromuscular canal, the radial nerve travels together with the deep brachial artery.
I find it difficult to answer

In the humeromuscular canal, the radial nerve travels together with the deep brachial artery.

4. Which arm muscle is innervated by the radial nerve?

M. biceps brachii

The radial nerve innervates the posterior group of arm muscles, which includes the triceps brachii.
M. triceps brachii

The radial nerve innervates the posterior group of arm muscles, which includes the triceps brachii.
Coracobrachialis

The radial nerve innervates the posterior group of arm muscles, which includes the triceps brachii.
M. brachialis

The radial nerve innervates the posterior group of arm muscles, which includes the triceps brachii.
I find it difficult to answer

The radial nerve innervates the posterior group of arm muscles, which includes the triceps brachii.

5. In which topographical region does the radial nerve divide into superficial and deep branches?

Cubital fossa

The radial nerve divides into terminal branches in the cubital fossa, between the brachialis and brachioradialis muscles.
Axillary fossa

The radial nerve divides into terminal branches in the cubital fossa, between the brachialis and brachioradialis muscles.
Middle third of the arm

The radial nerve divides into terminal branches in the cubital fossa, between the brachialis and brachioradialis muscles.
Wrist canal

The radial nerve divides into terminal branches in the cubital fossa, between the brachialis and brachioradialis muscles.
I find it difficult to answer

The radial nerve divides into terminal branches in the cubital fossa, between the brachialis and brachioradialis muscles.

6. Which nerve serves as a cutaneous branch of the radial nerve in the forearm?

Medial cutaneous nerve of the forearm

The posterior cutaneous nerve of the forearm branches from the radial nerve and innervates the skin of the posterior surface of the forearm.
Lateral cutaneous nerve of the forearm

The posterior cutaneous nerve of the forearm branches from the radial nerve and innervates the skin of the posterior surface of the forearm.
Posterior cutaneous nerve of the forearm

The posterior cutaneous nerve of the forearm branches from the radial nerve and innervates the skin of the posterior surface of the forearm.
Posterior cutaneous nerve of the arm

The posterior cutaneous nerve of the forearm branches from the radial nerve and innervates the skin of the posterior surface of the forearm.
I find it difficult to answer

The posterior cutaneous nerve of the forearm branches from the radial nerve and innervates the skin of the posterior surface of the forearm.

7. Which branch of the radial nerve passes through the supinator canal?

Superficial branch

The deep branch of the radial nerve pierces the supinator, passing through the supinator canal.
Posterior cutaneous nerve of the forearm

The deep branch of the radial nerve pierces the supinator, passing through the supinator canal.
Anterior interosseous nerve

The deep branch of the radial nerve pierces the supinator, passing through the supinator canal.
Deep branch

The deep branch of the radial nerve pierces the supinator, passing through the supinator canal.
I find it difficult to answer

The deep branch of the radial nerve pierces the supinator, passing through the supinator canal.

8. Which of the listed forearm muscles is NOT innervated by the radial nerve?

Extensor digitorum

The pronator teres is innervated by the median nerve, while the other muscles listed are innervated by the radial nerve.
Pronator teres

The pronator teres is innervated by the median nerve, while the other muscles listed are innervated by the radial nerve.
M. brachioradialis

The pronator teres is innervated by the median nerve, while the other muscles listed are innervated by the radial nerve.
Supinator

The pronator teres is innervated by the median nerve, while the other muscles listed are innervated by the radial nerve.
I find it difficult to answer

The pronator teres is innervated by the median nerve, while the other muscles listed are innervated by the radial nerve.

9. Which fingers' skin on the dorsum of the hand is innervated by the superficial branch of the radial nerve?

Fingers I, II, and the radial half of III

The superficial branch of the radial nerve innervates the skin of the radial 2.5 fingers on the dorsum of the hand.
Fingers V, IV, and the ulnar half of III

The superficial branch of the radial nerve innervates the skin of the radial 2.5 fingers on the dorsum of the hand.
Only fingers I and II

The superficial branch of the radial nerve innervates the skin of the radial 2.5 fingers on the dorsum of the hand.
All five fingers

The superficial branch of the radial nerve innervates the skin of the radial 2.5 fingers on the dorsum of the hand.
I find it difficult to answer

The superficial branch of the radial nerve innervates the skin of the radial 2.5 fingers on the dorsum of the hand.

10. What is the name of the continuation of the deep branch of the radial nerve in the forearm after emerging from the supinator muscle?

Anterior interosseous nerve

The deep branch of the radial nerve becomes the posterior interosseous nerve of the forearm.
Posterior cutaneous nerve of the forearm

The deep branch of the radial nerve becomes the posterior interosseous nerve of the forearm.
Dorsal branch n. ulnaris

The deep branch of the radial nerve becomes the posterior interosseous nerve of the forearm.
Posterior interosseous nerve

The deep branch of the radial nerve becomes the posterior interosseous nerve of the forearm.
I find it difficult to answer

The deep branch of the radial nerve becomes the posterior interosseous nerve of the forearm.

11. With which artery does the superficial branch of the radial nerve travel in the upper third of the forearm?

Ulnar artery

In the upper and middle thirds of the forearm, the superficial branch of the radial nerve accompanies the radial artery.
Common interosseous artery

In the upper and middle thirds of the forearm, the superficial branch of the radial nerve accompanies the radial artery.
Radial artery

In the upper and middle thirds of the forearm, the superficial branch of the radial nerve accompanies the radial artery.
Brachial artery

In the upper and middle thirds of the forearm, the superficial branch of the radial nerve accompanies the radial artery.
I find it difficult to answer

In the upper and middle thirds of the forearm, the superficial branch of the radial nerve accompanies the radial artery.

12. How is the superficial branch of the radial nerve positioned relative to the radial artery in the forearm?

Medial to the artery

The superficial branch of the radial nerve descends along the forearm lateral to the radial artery.
Lateral to the artery

The superficial branch of the radial nerve descends along the forearm lateral to the radial artery.
Superficial to the artery

The superficial branch of the radial nerve descends along the forearm lateral to the radial artery.
Deeper than the artery

The superficial branch of the radial nerve descends along the forearm lateral to the radial artery.
I find it difficult to answer

The superficial branch of the radial nerve descends along the forearm lateral to the radial artery.

13. Posterior to which artery does the radial nerve lie as it exits the brachial plexus in the axillary fossa?

Axillary artery

In the axillary fossa, the radial nerve, as a derivative of the posterior cord, lies posterior to the axillary artery.
A. subclavia

In the axillary fossa, the radial nerve, as a derivative of the posterior cord, lies posterior to the axillary artery.
Brachial artery

In the axillary fossa, the radial nerve, as a derivative of the posterior cord, lies posterior to the axillary artery.
Deep brachial artery

In the axillary fossa, the radial nerve, as a derivative of the posterior cord, lies posterior to the axillary artery.
I find it difficult to answer

In the axillary fossa, the radial nerve, as a derivative of the posterior cord, lies posterior to the axillary artery.

14. Through which intermuscular septum of the arm does the radial nerve bypass while leaving the humeromuscular canal?

Medial

The radial nerve penetrates the lateral intermuscular septum of the arm, entering the anterior cubital groove.
Anterior.

The radial nerve penetrates the lateral intermuscular septum of the arm, entering the anterior cubital groove.
Posterior

The radial nerve penetrates the lateral intermuscular septum of the arm, entering the anterior cubital groove.
Lateral.

The radial nerve penetrates the lateral intermuscular septum of the arm, entering the anterior cubital groove.
I find it difficult to answer

The radial nerve penetrates the lateral intermuscular septum of the arm, entering the anterior cubital groove.

15. Which spinal roots form the radial nerve?

C5-C6

The radial nerve contains nerve fibers from all roots of the brachial plexus (C5-T1).
C5-T1

The radial nerve contains nerve fibers from all roots of the brachial plexus (C5-T1).
C8-T1

The radial nerve contains nerve fibers from all roots of the brachial plexus (C5-T1).
C7-T1

The radial nerve contains nerve fibers from all roots of the brachial plexus (C5-T1).
I find it difficult to answer

The radial nerve contains nerve fibers from all roots of the brachial plexus (C5-T1).

16. In which topographical area does the posterior cutaneous nerve of the arm (n. cutaneus brachii posterior) branch from the radial nerve?

In the humeromuscular canal

The posterior cutaneous nerve of the arm branches from the radial nerve in the axillary fossa, before entering the humeromuscular canal.
In the cubital fossa

The posterior cutaneous nerve of the arm branches from the radial nerve in the axillary fossa, before entering the humeromuscular canal.
In the axillary fossa

The posterior cutaneous nerve of the arm branches from the radial nerve in the axillary fossa, before entering the humeromuscular canal.
In the supinator canal

The posterior cutaneous nerve of the arm branches from the radial nerve in the axillary fossa, before entering the humeromuscular canal.
I find it difficult to answer

The posterior cutaneous nerve of the arm branches from the radial nerve in the axillary fossa, before entering the humeromuscular canal.

17. Which forearm muscle is innervated by the posterior interosseous nerve?

Extensor indicis

The posterior interosseous nerve innervates the deep layer of the posterior forearm muscle group, including the extensor indicis.
Flexor pollicis longus

The posterior interosseous nerve innervates the deep layer of the posterior forearm muscle group, including the extensor indicis.
Palmaris longus

The posterior interosseous nerve innervates the deep layer of the posterior forearm muscle group, including the extensor indicis.
Flexor digitorum profundus

The posterior interosseous nerve innervates the deep layer of the posterior forearm muscle group, including the extensor indicis.
I find it difficult to answer

The posterior interosseous nerve innervates the deep layer of the posterior forearm muscle group, including the extensor indicis.

18. Where does the superficial branch of the radial nerve turn toward the dorsum of the hand?

Under the flexor retinaculum

In the lower third of the forearm, the superficial branch deviates towards the dorsum, passing beneath the tendon of m. brachioradialis
Through the anatomical snuffbox

In the lower third of the forearm, the superficial branch deviates towards the dorsum, passing beneath the tendon of m. brachioradialis
Through the carpal canal

In the lower third of the forearm, the superficial branch deviates towards the dorsum, passing beneath the tendon of m. brachioradialis
Beneath the tendon of the brachioradialis muscle in the lower third of the forearm

In the lower third of the forearm, the superficial branch deviates towards the dorsum, passing beneath the tendon of m. brachioradialis
I find it difficult to answer

In the lower third of the forearm, the superficial branch deviates towards the dorsum, passing beneath the tendon of m. brachioradialis

19. From which part of the radial nerve does the anconeus muscle (m. anconeus) receive innervation?

From the superficial branch of the radial nerve.

The branch to the anconeus muscle originates from the main trunk of the radial nerve, along with the branches to the triceps brachii.
Directly from the trunk in the arm.

The branch to the anconeus muscle originates from the main trunk of the radial nerve, along with the branches to the triceps brachii.
From the posterior interosseous nerve.

The branch to the anconeus muscle originates from the main trunk of the radial nerve, along with the branches to the triceps brachii.
From the posterior cutaneous nerve of the forearm.

The branch to the anconeus muscle originates from the main trunk of the radial nerve, along with the branches to the triceps brachii.
I find it difficult to answer

The branch to the anconeus muscle originates from the main trunk of the radial nerve, along with the branches to the triceps brachii.

20. Which thenar muscle is innervated by the radial nerve?

M. abductor pollicis brevis

Thenar muscles are innervated by the median and ulnar nerves; the radial nerve does not innervate the intrinsic muscles of the hand.
M. opponens pollicis

Thenar muscles are innervated by the median and ulnar nerves; the radial nerve does not innervate the intrinsic muscles of the hand.
None of the listed options

Thenar muscles are innervated by the median and ulnar nerves; the radial nerve does not innervate the intrinsic muscles of the hand.
M. flexor pollicis brevis

Thenar muscles are innervated by the median and ulnar nerves; the radial nerve does not innervate the intrinsic muscles of the hand.
I find it difficult to answer

Thenar muscles are innervated by the median and ulnar nerves; the radial nerve does not innervate the intrinsic muscles of the hand.