Forearm muscle anatomy test

1. Which nerve innervates the flexor carpi ulnaris (m. flexor carpi ulnaris)?

• Median nerve

  The flexor carpi ulnaris is one of the muscles on the anterior surface of the forearm and is innervated by the ulnar nerve, not the median nerve.

• Ulnar nerve

  The flexor carpi ulnaris is one of the muscles on the anterior surface of the forearm and is innervated by the ulnar nerve, not the median nerve.

• Radial nerve

  The flexor carpi ulnaris is one of the muscles on the anterior surface of the forearm and is innervated by the ulnar nerve, not the median nerve.

• Musculocutaneous nerve

  The flexor carpi ulnaris is one of the muscles on the anterior surface of the forearm and is innervated by the ulnar nerve, not the median nerve.

• I find it difficult to answer

  The flexor carpi ulnaris is one of the muscles on the anterior surface of the forearm and is innervated by the ulnar nerve, not the median nerve.

2. Which muscle of the anterior forearm group is innervated by the radial nerve?

• Pronator teres

  Despite its location in the anterior region of the forearm, the brachioradialis is innervated by radial nerve branches.

• Flexor carpi radialis

  Despite its location in the anterior region of the forearm, the brachioradialis is innervated by radial nerve branches.

• Palmaris longus muscle

  Despite its location in the anterior region of the forearm, the brachioradialis is innervated by radial nerve branches.

• Brachioradialis muscle

  Despite its location in the anterior region of the forearm, the brachioradialis is innervated by radial nerve branches.

• I find it difficult to answer

  Despite its location in the anterior region of the forearm, the brachioradialis is innervated by radial nerve branches.

3. Which sections of the deep flexor of the fingers (m. flexor digitorum profundus) are innervated by the ulnar nerve?

• Sections for fingers IV and V

  The flexor digitorum profundus has dual innervation: the medial portion (fingers IV, V) is innervated by the ulnar nerve, and the lateral by the median.

• Sections for fingers II and III

  The flexor digitorum profundus has dual innervation: the medial portion (fingers IV, V) is innervated by the ulnar nerve, and the lateral by the median.

• Sections for fingers I and II

  The flexor digitorum profundus has dual innervation: the medial portion (fingers IV, V) is innervated by the ulnar nerve, and the lateral by the median.

• All sections are innervated by the median nerve

  The flexor digitorum profundus has dual innervation: the medial portion (fingers IV, V) is innervated by the ulnar nerve, and the lateral by the median.

• I find it difficult to answer

  The flexor digitorum profundus has dual innervation: the medial portion (fingers IV, V) is innervated by the ulnar nerve, and the lateral by the median.

4. From which artery is the supinator (m. supinator) primarily supplied?

• Anterior interosseous artery

  The supinator is supplied by branches of the radial artery (a. recurrens radialis) and the recurrent interosseous artery.

• Superficial palmar arch

  The supinator is supplied by branches of the radial artery (a. recurrens radialis) and the recurrent interosseous artery.

• Recurrent radial artery

  The supinator is supplied by branches of the radial artery (a. recurrens radialis) and the recurrent interosseous artery.

• Ulnar artery

  The supinator is supplied by branches of the radial artery (a. recurrens radialis) and the recurrent interosseous artery.

• I find it difficult to answer

  The supinator is supplied by branches of the radial artery (a. recurrens radialis) and the recurrent interosseous artery.

5. Which nerve innervates the pronator quadratus (m. pronator quadratus)?

• Ulnar nerve

  The pronator quadratus is located in the deep layer of the anterior group and is innervated by the anterior interosseous nerve (a branch of the median nerve).

• Anterior interosseous nerve

  The pronator quadratus is located in the deep layer of the anterior group and is innervated by the anterior interosseous nerve (a branch of the median nerve).

• Deep branch of radial nerve

  The pronator quadratus is located in the deep layer of the anterior group and is innervated by the anterior interosseous nerve (a branch of the median nerve).

• Superficial branch of radial nerve

  The pronator quadratus is located in the deep layer of the anterior group and is innervated by the anterior interosseous nerve (a branch of the median nerve).

• I find it difficult to answer

  The pronator quadratus is located in the deep layer of the anterior group and is innervated by the anterior interosseous nerve (a branch of the median nerve).

6. Which artery runs in the radial groove (sulcus radialis) of the forearm along with the superficial branch of the radial nerve?

• Anterior interosseous artery

  In the radial groove formed by the brachioradialis and the radial flexor of the wrist, the radial artery passes.

• Ulnar artery

  In the radial groove formed by the brachioradialis and the radial flexor of the wrist, the radial artery passes.

• Common interosseous artery

  In the radial groove formed by the brachioradialis and the radial flexor of the wrist, the radial artery passes.

• Radial artery

  In the radial groove formed by the brachioradialis and the radial flexor of the wrist, the radial artery passes.

• I find it difficult to answer

  In the radial groove formed by the brachioradialis and the radial flexor of the wrist, the radial artery passes.

7. Identify the nerve innervating the extensor digitorum (m. extensor digitorum):

• Deep branch of radial nerve

  All muscles of the posterior forearm group, including the extensor digitorum, are innervated by branches of the radial nerve (primarily the deep branch).

• Median nerve

  All muscles of the posterior forearm group, including the extensor digitorum, are innervated by branches of the radial nerve (primarily the deep branch).

• Musculocutaneous nerve

  All muscles of the posterior forearm group, including the extensor digitorum, are innervated by branches of the radial nerve (primarily the deep branch).

• Ulnar nerve

  All muscles of the posterior forearm group, including the extensor digitorum, are innervated by branches of the radial nerve (primarily the deep branch).

• I find it difficult to answer

  All muscles of the posterior forearm group, including the extensor digitorum, are innervated by branches of the radial nerve (primarily the deep branch).

8. The blood supply to the superficial flexor of the fingers (m. flexor digitorum superficialis) is primarily from:

• Posterior interosseous artery

  The flexor digitorum superficialis receives branches from both the radial and ulnar arteries of the forearm.

• Deep brachial artery

  The flexor digitorum superficialis receives branches from both the radial and ulnar arteries of the forearm.

• Radial and ulnar arteries

  The flexor digitorum superficialis receives branches from both the radial and ulnar arteries of the forearm.

• Axillary artery

  The flexor digitorum superficialis receives branches from both the radial and ulnar arteries of the forearm.

• I find it difficult to answer

  The flexor digitorum superficialis receives branches from both the radial and ulnar arteries of the forearm.

9. Which forearm muscle is innervated by the superficial branch of the radial nerve?

• Extensor carpi radialis longus

  The superficial branch of the radial nerve is entirely sensory and does not innervate forearm muscles.

• None of the forearm muscles

  The superficial branch of the radial nerve is entirely sensory and does not innervate forearm muscles.

• Extensor carpi radialis brevis

  The superficial branch of the radial nerve is entirely sensory and does not innervate forearm muscles.

• Extensor carpi ulnaris

  The superficial branch of the radial nerve is entirely sensory and does not innervate forearm muscles.

• I find it difficult to answer

  The superficial branch of the radial nerve is entirely sensory and does not innervate forearm muscles.

10. From which vessel does the common interosseous artery (a. interossea communis) originate?

• Radial artery

  The common interosseous artery is a large, short branch of the ulnar artery, which then divides into the anterior and posterior interosseous arteries.

• Brachial artery

  The common interosseous artery is a large, short branch of the ulnar artery, which then divides into the anterior and posterior interosseous arteries.

• Subclavian artery

  The common interosseous artery is a large, short branch of the ulnar artery, which then divides into the anterior and posterior interosseous arteries.

• Ulnar artery

  The common interosseous artery is a large, short branch of the ulnar artery, which then divides into the anterior and posterior interosseous arteries.

• I find it difficult to answer

  The common interosseous artery is a large, short branch of the ulnar artery, which then divides into the anterior and posterior interosseous arteries.

11. Which nerve pierces the supinator, passing through the supinator canal (canalis supinatorius)?

• Deep branch of radial nerve

  The deep branch of the radial nerve penetrates the posterior forearm region, piercing the m. supinator.

• Anterior interosseous nerve

  The deep branch of the radial nerve penetrates the posterior forearm region, piercing the m. supinator.

• Median nerve

  The deep branch of the radial nerve penetrates the posterior forearm region, piercing the m. supinator.

• Ulnar nerve

  The deep branch of the radial nerve penetrates the posterior forearm region, piercing the m. supinator.

• I find it difficult to answer

  The deep branch of the radial nerve penetrates the posterior forearm region, piercing the m. supinator.

12. Which forearm muscle is innervated directly by the trunk of the radial nerve before its division into superficial and deep branches?

• Extensor digiti minimi

  M. extensor carpi radialis longus and m. brachioradialis are innervated by the radial nerve before it enters the supinator canal.

• Extensor indicis

  M. extensor carpi radialis longus and m. brachioradialis are innervated by the radial nerve before it enters the supinator canal.

• Extensor carpi radialis longus

  M. extensor carpi radialis longus and m. brachioradialis are innervated by the radial nerve before it enters the supinator canal.

• Extensor carpi radialis brevis

  M. extensor carpi radialis longus and m. brachioradialis are innervated by the radial nerve before it enters the supinator canal.

• I find it difficult to answer

  M. extensor carpi radialis longus and m. brachioradialis are innervated by the radial nerve before it enters the supinator canal.

13. The anterior interosseous artery (a. interossea anterior) primarily supplies:

• The superficial muscles of the posterior group

  The anterior interosseous artery runs along the anterior surface of the interosseous membrane supplying the deep flexors and the pronator quadratus.

• The deep muscles of the anterior group

  The anterior interosseous artery runs along the anterior surface of the interosseous membrane supplying the deep flexors and the pronator quadratus.

• The lateral group muscles

  The anterior interosseous artery runs along the anterior surface of the interosseous membrane supplying the deep flexors and the pronator quadratus.

• The skin of the posterior aspect of the forearm

  The anterior interosseous artery runs along the anterior surface of the interosseous membrane supplying the deep flexors and the pronator quadratus.

• I find it difficult to answer

  The anterior interosseous artery runs along the anterior surface of the interosseous membrane supplying the deep flexors and the pronator quadratus.

14. Through which heads does the median nerve pass on the forearm?

• Flexor carpi ulnaris

  The median nerve exits the cubital fossa, passing between the humeral and ulnar heads of the pronator teres.

• Brachioradialis muscle

  The median nerve exits the cubital fossa, passing between the humeral and ulnar heads of the pronator teres.

• Supinator

  The median nerve exits the cubital fossa, passing between the humeral and ulnar heads of the pronator teres.

• Pronator teres

  The median nerve exits the cubital fossa, passing between the humeral and ulnar heads of the pronator teres.

• I find it difficult to answer

  The median nerve exits the cubital fossa, passing between the humeral and ulnar heads of the pronator teres.

15. The ulnar nerve on the forearm follows the ulnar groove (sulcus ulnaris) accompanied by:

• Ulnar artery

  Within the ulnar groove, formed by the flexor carpi ulnaris and the flexor digitorum superficialis, lie the ulnar artery and nerve.

• Radial artery

  Within the ulnar groove, formed by the flexor carpi ulnaris and the flexor digitorum superficialis, lie the ulnar artery and nerve.

• Anterior interosseous artery

  Within the ulnar groove, formed by the flexor carpi ulnaris and the flexor digitorum superficialis, lie the ulnar artery and nerve.

• Deep vein of the arm

  Within the ulnar groove, formed by the flexor carpi ulnaris and the flexor digitorum superficialis, lie the ulnar artery and nerve.

• I find it difficult to answer

  Within the ulnar groove, formed by the flexor carpi ulnaris and the flexor digitorum superficialis, lie the ulnar artery and nerve.

16. Which artery participates in supplying the brachioradialis muscle?

• Posterior interosseous artery

  The brachioradialis muscle receives supply from the radial artery as well as the radial collateral and recurrent radial arteries.

• Ulnar artery

  The brachioradialis muscle receives supply from the radial artery as well as the radial collateral and recurrent radial arteries.

• Radial artery

  The brachioradialis muscle receives supply from the radial artery as well as the radial collateral and recurrent radial arteries.

• Common interosseous artery

  The brachioradialis muscle receives supply from the radial artery as well as the radial collateral and recurrent radial arteries.

• I find it difficult to answer

  The brachioradialis muscle receives supply from the radial artery as well as the radial collateral and recurrent radial arteries.

17. The posterior interosseous artery (a. interossea posterior) exits onto the posterior surface of the forearm through:

• Supinator canal

  The posterior interosseous artery pierces the interosseous membrane in its upper region, exiting to the posterior compartment of the forearm.

• The opening in the proximal part of the interosseous membrane

  The posterior interosseous artery pierces the interosseous membrane in its upper region, exiting to the posterior compartment of the forearm.

• Wrist canal

  The posterior interosseous artery pierces the interosseous membrane in its upper region, exiting to the posterior compartment of the forearm.

• Guyon's canal

  The posterior interosseous artery pierces the interosseous membrane in its upper region, exiting to the posterior compartment of the forearm.

• I find it difficult to answer

  The posterior interosseous artery pierces the interosseous membrane in its upper region, exiting to the posterior compartment of the forearm.

18. The muscles of the lateral group of the forearm (brachioradialis, long and short radial extensors of the wrist) are innervated by:

• Musculocutaneous nerve

  The entire lateral and posterior groups of forearm muscles receive innervation from the radial nerve and its deep branch.

• Median nerve

  The entire lateral and posterior groups of forearm muscles receive innervation from the radial nerve and its deep branch.

• Axillary nerve

  The entire lateral and posterior groups of forearm muscles receive innervation from the radial nerve and its deep branch.

• Radial nerve

  The entire lateral and posterior groups of forearm muscles receive innervation from the radial nerve and its deep branch.

• I find it difficult to answer

  The entire lateral and posterior groups of forearm muscles receive innervation from the radial nerve and its deep branch.

19. The flexor carpi ulnaris (m. flexor carpi ulnaris) is predominantly supplied by:

• Ulnar artery

  The flexor carpi ulnaris is positioned medially and receives branches from the ulnar artery, superior and inferior ulnar collateral arteries.

• Radial artery

  The flexor carpi ulnaris is positioned medially and receives branches from the ulnar artery, superior and inferior ulnar collateral arteries.

• Anterior interosseous artery

  The flexor carpi ulnaris is positioned medially and receives branches from the ulnar artery, superior and inferior ulnar collateral arteries.

• Deep brachial artery

  The flexor carpi ulnaris is positioned medially and receives branches from the ulnar artery, superior and inferior ulnar collateral arteries.

• I find it difficult to answer

  The flexor carpi ulnaris is positioned medially and receives branches from the ulnar artery, superior and inferior ulnar collateral arteries.

20. Which nerve innervates the abductor pollicis longus muscle (m. abductor pollicis longus)?

• Anterior interosseous nerve

  The abductor pollicis longus belongs to the deep layer of the posterior group and is innervated by the posterior interosseous nerve.

• Superficial branch of radial nerve

  The abductor pollicis longus belongs to the deep layer of the posterior group and is innervated by the posterior interosseous nerve.

• Posterior interosseous nerve

  The abductor pollicis longus belongs to the deep layer of the posterior group and is innervated by the posterior interosseous nerve.

• Ulnar nerve

  The abductor pollicis longus belongs to the deep layer of the posterior group and is innervated by the posterior interosseous nerve.

• I find it difficult to answer

  The abductor pollicis longus belongs to the deep layer of the posterior group and is innervated by the posterior interosseous nerve.