Quiz: Anatomy_Lab17

Question 1

1) Identify A.

Choices:

• first lumbrical
• ulnar nerve
• median nerve
• radial artery
• brachioradialis
• flexor carpi radialis
• flexor carpi ulnaris
• flexor digitorum superficialis

Answers:

• first lumbrical

Comments:

• Correct
• That's right! The lumbricals (A) arise from FDP and wrap around the lateral aspect of MCP joint. The 1st and 2nd lumbricals are innervated by median nerve, whereas the 3rd and 4th are innervated by ulnar nerve.
• Continue

Question 2

2) What nerve supplies muscle B?

Choices:

• main branch of median nerve
• ulnar nerve
• recurrent branch of median nerve
• radial nerve
• musculocutaneous nerve
• axillary nerve

Answers:

• recurrent branch of median nerve

Comments:

• Correct
• That's right! The recurrent branch of the median nerve innervates the three thenar muscles (B), and thereby contributes to flexion, abduction and opposition of thumb.
• Continue

Question 3

3) Identify C.

Choices:

• first lumbrical
• ulnar nerve
• median nerve
• radial artery
• brachioradialis
• flexor carpi radialis
• flexor carpi ulnaris
• flexor digitorum superficialis

Answers:

• median nerve

Comments:

• Correct
• That's right! The median nerve (C) is medial to the flexor carpi radialis tendon. The nerve enters the carpal tunnel with the long flexor tendons, and is therefore affected in carpal tunnel syndrome.
• Continue

Question 4

4) Identify D.

Choices:

• first lumbrical
• ulnar nerve
• median nerve
• radial artery
• brachioradialis
• flexor carpi radialis
• flexor carpi ulnaris
• flexor digitorum superficialis

Answers:

• radial artery

Comments:

• Correct
• That's right! The radial artery (D) is located lateral to flexor carpi radialis tendon.
• Continue

Question 5

5) Identify E.

Choices:

• first lumbrical
• ulnar nerve
• median nerve
• radial artery
• brachioradialis
• flexor carpi radialis
• flexor carpi ulnaris
• flexor digitorum superficialis

Answers:

• brachioradialis

Comments:

• Correct
• That's right! The tendon of brachioradialis is the most lateral tendon of the wrist.
• Continue

Question 6

6) Identify F.

Choices:

• first lumbrical
• ulnar nerve
• median nerve
• radial artery
• brachioradialis
• flexor carpi radialis
• flexor carpi ulnaris
• flexor digitorum superficialis

Answers:

• flexor carpi radialis

Comments:

• Correct
• That's right! The flexor carpi radialis muscle is labelled ‘F’. It is flanked laterally by the radial artery and medially by the median nerve.
• Continue

Question 7

7) Identify G.

Choices:

• first lumbrical
• ulnar nerve
• median nerve
• radial artery
• brachioradialis
• flexor carpi radialis
• flexor carpi ulnaris
• flexor digitorum superficialis

Answers:

• flexor carpi ulnaris

Comments:

• Correct
• That's right! The flexor carpi ulnaris (G) tendon is located most medially.
• Continue

Question 8

8) Identify H.

Choices:

• first lumbrical
• ulnar nerve
• median nerve
• radial artery
• brachioradialis
• flexor carpi radialis
• flexor carpi ulnaris
• flexor digitorum superficialis

Answers:

• flexor digitorum superficialis

Comments:

• Correct
• That's right! The flexor digitorum superficialis (H) is located in the midline of the anterior wrist.
• Continue

Question 9

9) Identify I.

Choices:

• first lumbrical
• ulnar nerve
• median nerve
• radial artery
• brachioradialis
• flexor carpi radialis
• flexor carpi ulnaris
• flexor digitorum superficialis

Answers:

• ulnar nerve

Comments:

• Correct
• That's right! The ulnar nerve (I) is located on the medial side of wrist. It innervates most of the intrinsic muscles of hand and does NOT pass through the carpal tunnel.
• Continue

Question 10

10) What nerve innervates muscle J?

Choices:

• main branch of median nerve
• ulnar nerve
• recurrent branch of median nerve
• radial nerve
• musculocutaneous nerve
• axillary nerve

Answers:

• ulnar nerve

Comments:

• Correct
• That's right! The ulnar nerve innervates the hypothenar muscles (e.g. muscle J). The hypothenars are located at the base of the 5th digit.
• Continue

Question 11

11) What muscles are responsible for the position of the hand in this picture?

Choices:

• lumbricals
• dorsal interossei
• extensor digitorum
• flexor digitorum superficialis
• flexor digitorum profundus

Answers:

• lumbricals

Comments:

• Correct
• That's right! The lumbricals are responsible for flexing the MCP joints and extending the PIP and DIP joints.
• Continue

Question 12

12) The paper is being gripped between the index and middle fingers. What muscles and nerve are responsible for this action?

Choices:

• palmar interossei, ulnar nerve
• dorsal interossei, ulnar nerve
• lumbricals, ulnar nerve
• lumbricals, median nerve
• palmar interossei, median nerve
• dorsal interossei, median nerve

Answers:

• palmar interossei, ulnar nerve

Comments:

• Correct
• That's right! In order to grip the paper, the palmar interossei adduct the fingers. Since the interossei are intrinsic muscles of the hand, they are innervated by ulnar nerve.
• Continue

Question 13

13) The paper is being pinched between the pad of the thumb and the pad of the index finger. What muscle and nerve are responsible for the action of the thumb?

Choices:

• opponens pollicis, median nerve
• opponens pollicis, ulnar nerve
• adductor pollicis, ulnar nerve
• adductor pollicis, median nerve
• flexor pollicis longus, median nerve
• flexor pollicis longus, ulnar nerve
• adductor pollicis brevis, median nerve
• adductor pollicis brevis, ulnar nerve
• flexor pollicis brevis, median nerve
• flexor pollicis brevis, ulnar nerve

Answers:

• opponens pollicis, median nerve

Comments:

• Correct
• That's right! The opponens pollicis is responsible for opposition, a movement that only occurs at the 1st carpometacarpal joint. Opponens pollicis is a thenar muscle, and therefore is innervated by the recurrent branch of the median nerve.
• Continue

Question 14

14. Identify A.

Choices:

• flexor retinaculum
• abductor pollicis brevis muscle
• branch of the radial artery
• flexor pollicis brevis muscle
• superficial palmar arch
• ulnar artery
• ulnar nerve
• median nerve

Answers:

• flexor retinaculum

Comments:

• Correct
• That's right! Flexor retinaculum (A) is the fibrous band that forms the anterior wall of the carpal tunnel.
• Continue

Question 15

15. Identify B.

Choices:

• flexor retinaculum
• abductor pollicis brevis muscle
• branch of the radial artery
• flexor pollicis brevis muscle
• superficial palmar arch
• ulnar artery
• ulnar nerve
• median nerve

Answers:

• abductor pollicis brevis muscle

Comments:

• Correct
• That's right! Abductor pollicis brevis (B) pulls the thumb out of the plane of the palm.
• Continue

Question 16

16. Identify C.

Choices:

• flexor retinaculum
• abductor pollicis brevis muscle
• branch of the radial artery
• flexor pollicis brevis muscle
• superficial palmar arch
• ulnar artery
• ulnar nerve
• median nerve

Answers:

• branch of the radial artery

Comments:

• Correct
• That's right! ‘C’ is indicating the superficial branch of the radial artery contributing to the superficial palmar arch.
• Continue

Question 17

17. Identify D.

Choices:

• flexor retinaculum
• abductor pollicis brevis muscle
• branch of the radial artery
• flexor pollicis brevis muscle
• superficial palmar arch
• ulnar artery
• ulnar nerve
• median nerve

Answers:

• flexor pollicis brevis muscle

Comments:

• Correct
• That's right! Flexor pollicis brevis (D) pulls thumb across the palm, therefore its attachment points are slightly different from the abductor pollicis brevis.
• Continue

Question 18

18. Identify E.

Choices:

• flexor retinaculum
• abductor pollicis brevis muscle
• branch of the radial artery
• flexor pollicis brevis muscle
• superficial palmar arch
• ulnar artery
• ulnar nerve
• median nerve

Answers:

• superficial palmar arch

Comments:

• Correct
• That's right! The superficial palmar arch is labelled ‘E’. It is formed by the union of the superficial branches of the ulnar and radial arteries.
• Continue

Question 19

19. Identify F.

Choices:

• flexor retinaculum
• abductor pollicis brevis muscle
• branch of the radial artery
• flexor pollicis brevis muscle
• superficial palmar arch
• ulnar artery
• ulnar nerve
• median nerve

Answers:

• ulnar artery

Comments:

• Correct
• That's right! The ulnar artery (F) is located on the medial side of wrist and hand and passes superficial to the flexor retinaculum
• Continue

Question 20

20. Identify G.

Choices:

• flexor retinaculum
• abductor pollicis brevis muscle
• branch of the radial artery
• flexor pollicis brevis muscle
• superficial palmar arch
• ulnar artery
• ulnar nerve
• median nerve

Answers:

• ulnar nerve

Comments:

• Correct
• That's right! The ulnar nerve (G) travels with the ulnar artery. The ulnar nerve innervates most of the intrinsic muscles of hand. Do you know the exceptions?
• Continue

Question 21

21. Identify H.

Choices:

• flexor retinaculum
• abductor pollicis brevis muscle
• branch of the radial artery
• flexor pollicis brevis muscle
• superficial palmar arch
• ulnar artery
• ulnar nerve
• median nerve

Answers:

• median nerve

Comments:

• Correct
• That's right! The median nerve is labelled ’H’. The median nerve passes through the carpal tunnel. Its recurrent branch innervates the thenar muscles. Its main branch continues on to innervate the lateral two lumbricals and to provide cutaneous sensation to portions of the lateral hand.
• Continue

Question 22

22. What is the action of muscle A?.

Choices:

• abduction of the thumb
• opposition of the thumb
• flexion of the thumb
• adduction of the thumb

Answers:

• abduction of the thumb

Comments:

• Correct
• That's right! The abductor pollicis brevis is labelled ‘A’. It facilitates abduction of the thumb. Remember, abduction of thumb is different from abduction of the fingers!
• Continue

Question 23

23. What nerve innervates muscle A?.

Choices:

• recurrent branch of the median nerve
• main branch of the median nerve
• ulnar nerve
• radial nerve

Answers:

• recurrent branch of the median nerve

Comments:

• Correct
• That's right! Flexor pollicis brevis (muscle A) is one of the three thenar muscles, and is therefore innervated by the recurrent branch of the median nerve.
• Continue

Question 24

24. What is the action of muscle A?

Choices:

• abduction of the thumb
• opposition of the thumb
• flexion of the thumb
• adduction of the thumb

Answers:

• flexion of the thumb

Comments:

• Correct
• That's right! The flexor pollicis brevis (muscle A) flexes the thumb.
• Continue

Question 25

25. Identify A.

Choices:

• opponens pollicis muscle
• flexor pollicis brevis muscle
• adductor pollicis muscle
• tendon of flexor pollicis longus muscle
• hypothenar group of muscles
• lumbrical muscles

Answers:

• opponens pollicis muscle

Comments:

• Correct
• That's right! The opponens pollicis muscle (A) only crosses the carpometacarpal joint. This helps us to differentiate it from the more superficial abductor pollicis brevis, which crosses the MCP to insert on the proximal phalange of the thumb.
• Continue

Question 26

26. Identify B.

Choices:

• opponens pollicis muscle
• flexor pollicis brevis muscle
• adductor pollicis muscle
• tendon of flexor pollicis longus muscle
• hypothenar group of muscles
• lumbrical muscles

Answers:

• flexor pollicis brevis muscle

Comments:

• Correct
• That's right! The flexor pollicis brevis muscle (B) is medial to the other two thenar muscles.
• Continue

Question 27

27. Identify C.

Choices:

• opponens pollicis muscle
• flexor pollicis brevis muscle
• adductor pollicis muscle
• tendon of flexor pollicis longus muscle
• hypothenar group of muscles
• lumbrical muscles

Answers:

• adductor pollicis muscle

Comments:

• Correct
• That's right! The adductor pollicis (C) extends horizontally from the palm of hand to thumb, bringing the abducted thumb back in line with the palm .
• Continue

Question 28

28. Identify D.

Choices:

• opponens pollicis muscle
• flexor pollicis brevis muscle
• adductor pollicis muscle
• tendon of flexor pollicis longus muscle
• hypothenar group of muscles
• lumbrical muscles

Answers:

• tendon of flexor pollicis longus muscle

Comments:

• Correct
• That's right! The tendon of the flexor pollicis longus (D) passes the carpometacarpal, MCP and IP joints, therefore flexes the thumb as a whole.
• Continue

Question 29

29. Identify E.

Choices:

• opponens pollicis muscle
• flexor pollicis brevis muscle
• adductor pollicis muscle
• tendon of flexor pollicis longus muscle
• hypothenar group of muscles
• lumbrical muscles

Answers:

• hypothenar group of muscles

Comments:

• Correct
• That's right! The hypothenar muscle group (E) acts on the fifth digit. These muscles form the hypothenar eminence and are innervated by ulnar nerve. They may waste in an ulnar neuropathy.
• Continue

Question 30

30. Identify F.

Choices:

• opponens pollicis muscle
• flexor pollicis brevis muscle
• adductor pollicis muscle
• tendon of flexor pollicis longus muscle
• hypothenar group of muscles
• lumbrical muscles

Answers:

• lumbrical muscles

Comments:

• Correct
• That's right! The lumbrical muscles (F) originate from the flexor digitorum superficialis (FDS) tendons, wrap around the lateral aspect of MCP joint and insert into the extensor expansion.
• Continue

Question 31

31. What is the action of muscle A?

Choices:

• flexion of the MCP joints and extension of the PIP and DIP joints
• flexion of the MCP, PIP and DIP joints
• extension of the MCP joints and flexion of the PIP and DIP joints
• flexion of the MCP joints only

Answers:

• flexion of the MCP joints and extension of the PIP and DIP joints

Comments:

• Correct
• That's right! Based on their course and insertion, the lumbricals (A) flex the MCP joints and extend the PIP and DIP joints
• Continue

Question 32

32. What nerve innervates A, B, and C?

Choices:

• recurrent branch of the median nerve
• main branch of the median nerve
• ulnar nerve
• radial nerve

Answers:

• ulnar nerve

Comments:

• Correct
• That's right! The ulnar nerve innervates the adductor pollicis (A), hypothenar muscles (B) and the 3rd and 4th lumbricals (C).
• Continue

Question 33

33. What nerve innervates muscles A and B?

Choices:

• recurrent branch of the median nerve
• main branch of the median nerve
• ulnar nerve
• radial nerve

Answers:

• recurrent branch of the median nerve

Comments:

• Correct
• That's right! The recurrent branch of the median nerve innervates the opponens pollicis (A) and the flexor pollicis brevis (B). Both of these muscles are thenar muscles.
• Continue

Question 34

34. What nerve innervates muscle C?

Choices:

• recurrent branch of the median nerve
• main branch of the median nerve
• ulnar nerve
• radial nerve

Answers:

• main branch of the median nerve

Comments:

• Correct
• That's right! The main branch of the median nerve innervates the lateral lumbricals (C).
• Continue

Question 1

1. The _______________ nerve is associated with both flexion of the elbow and supination of the forearm.

Choices:

• musculocutaneous

Answers:

• musculocutaneous

Comments:

• Correct
• That's right! The musculocutaneous nerve innervates muscles of the anterior compartment of the arm which includes the biceps brachii – supination of forearm and flexion of elbow.
• Continue

Question 2

2. The _______________ nerve is associated with cutaneous sensation over the lateral aspect of the forearm, as indicated by the letter A.

Choices:

• musculocutaneous

Answers:

• musculocutaneous

Comments:

• Correct
• That's right! The musculocutaneous nerve ends as lateral cutaneous nerve of the forearm, monitoring skin of the lateral forearm.
• Continue

Question 3

3. The _______________ nerve is associated with abduction of the shoulder.

Choices:

• axillary

Answers:

• axillary

Comments:

• Correct
• That's right! The axillary nerve innervates the deltoid muscle, the major abductor of shoulder.
• Continue

Question 4

4. The _______________ nerve is associated with cutaneous sensation over the lateral aspect of the shoulder, as indicated by the letter A.

Choices:

• axillary

Answers:

• axillary

Comments:

• Correct
• That's right! The axillary nerve innervates the deltoid muscle and the skin overlying it.
• Continue

Question 5

5. The _______________ nerve is associated with extension of the elbow, wrist, thumb and digits.

Choices:

• radial

Answers:

• radial

Comments:

• Correct
• That's right! The radial nerve innervates all muscle of the posterior compartment of arm and forearm, therefore it is associated with extension of the elbow, wrist, thumb and digits.
• Continue

Question 6

6. The _______________ nerve is associated with cutaneous sensation over the posterior aspect of the arm and lateral hand, as indicated by the letter A.

Choices:

• radial

Answers:

• radial

Comments:

• Correct
• That's right! The radial nerve is responsible for cutaneous sensation over the posterior aspect of the arm, forearm and lateral hand.
• Continue

Question 7

7. The _______________ nerve is associated with flexion of the wrist, MCPs and lateral digits.

Choices:

• median

Answers:

• median

Comments:

• Correct
• That's right! The median nerve innervates muscles of the anterior compartment of the forearm. These muscles are associated with flexion of the wrist, MCPs and the lateral digits.
• Continue

Question 8

8. The _______________ nerve is associated with cutaneous sensation over the anterolateral hand, as indicated by the letter A.

Choices:

• median

Answers:

• median

Comments:

• Correct
• That's right! The median nerve is associated with the cutaneous sensation over the anterolateral hand. Remember, the palmar branch of the median nerve is unaffected in carpal tunnel syndrome.
• Continue

Question 9

9. The _______________ nerve is associated with flexion of the wrist and medial two digits.

Choices:

• ulnar

Answers:

• ulnar

Comments:

• Correct
• That's right! The ulnar nerve contributes to flexion of the wrist and medial two digits by innervating FCU and medial half of FDP.
• Continue

Question 10

10. The _______________ nerve is associated with cutaneous sensation over the medial hand, as indicated by the letter A.

Choices:

• ulnar

Answers:

• ulnar

Comments:

• Correct
• That's right! The ulnar nerve is responsible for cutaneous sensation over the medial hand.
• Continue

Question 11

11. The _______________ nerve is associated with extension of the knee.

Choices:

• femoral

Answers:

• femoral

Comments:

• Correct
• That's right! The femoral nerve innervates all muscles of the anterior compartment of thigh and therefore is responsible for extension of the knee.
• Continue

Question 12

12. The specific nerve branch responsible for cutaneous sensation at A is the ________________. (hint: enter six words)

Choices:

• anterior cutaneous nerve of the thigh

Answers:

• anterior cutaneous nerve of the thigh

Comments:

• Correct
• That's right! The femoral nerve gives rise to two major cutaneous nerves. Anterior cutaneous nerve of the thigh is responsible for cutaneous sensation at ‘A’.
• Continue

Question 13

13. The specific nerve branch responsible for cutaneous sensation over the medial aspect of the leg and foot, as indicated by the letter A, is the ________________ nerve.

Choices:

• saphenous

Answers:

• saphenous

Comments:

• Correct
• That's right! The saphenous nerve is the only branch of femoral nerve that passes the knee. It is responsible for cutaneous sensation over the medial aspect of leg and foot.
• Continue

Question 14

14. The _______________ nerve is associated with adduction of the hip.

Choices:

• obturator

Answers:

• obturator

Comments:

• Correct
• That's right! The obturator nerve innervate most muscles of the medial compartment of the thigh and is therefore responsible for adduction of the hip.
• Continue

Question 15

15. The ______________ nerve is associated with cutaneous sensation over the medial thigh, as indicated by the letter A.

Choices:

• obturator

Answers:

• obturator

Comments:

• Correct
• That's right! The obturator nerve sends sensory fibres to supply the medial thigh, therefore it is responsible for cutaneous sensation at A.
• Continue

Question 16

16. The ________ _______ nerve is associated with abduction of the hip.

Choices:

• superior gluteal

Answers:

• superior gluteal

Comments:

• Correct
• That's right! The superior gluteal nerve innervates gluteus medius, minimus and tensor fascia lata. Gluteus medius and minimus act to abduct and medially rotate the hip!
• Continue

Question 17

17. The ________ _______ nerve is associated with extension of the hip.

Choices:

• inferior gluteal

Answers:

• inferior gluteal

Comments:

• Correct
• That's right! The inferior gluteal nerve innervates gluteus maximus, a muscle that is responsible for extension and lateral rotation of the hip.
• Continue

Question 18

18. The _______ nerve is associated with plantarflexion of the talocrural joint, inversion of the foot, and flexion of the toes.

Choices:

• tibial

Answers:

• tibial

Comments:

• Correct
• That's right! The tibial nerve innervates muscles of the posterior superficial and deep compartment of the leg. Hence, the nerve is associated with plantarflexion of the ankle, inversion of the foot and flexion of the toes.
• Continue

Question 19

19. The specific nerve branch responsible for cutaneous sensation over the lateral aspect of the distal leg and foot, as indicated by the letter A, is the ________________ nerve.

Choices:

• sural

Answers:

• sural

Comments:

• Correct
• That's right! The sural nerve is a cutaneous branch of the tibial nerve which is responsible for cutaneous sensation over the lateral aspect of distal leg and foot.
• Continue

Question 20

20. The specific nerve branch responsible for cutaneous sensation over the heel, as indicated by the letter A, is the ________________ nerve.

Choices:

• calcaneal

Answers:

• calcaneal

Comments:

• Correct
• That's right! The calcaneal nerve is a specific cutaneous nerve branch of the tibial nerve. The calcaneal nerve provides cutaneous sensation over the heel.
• Continue

Question 21

21. The ______ _______ nerve is associated with eversion of the foot.

Choices:

• superficial fibular
• superficial peroneal

Answers:

• superficial fibular
• superficial peroneal

Comments:

• Correct
• That's right! The superficial fibular nerve innervates muscles in the lateral compartment of leg (fibularis longus & brevis). These muscles evert the foot.
• Continue

Question 22

22. The specific nerve branch responsible for cutaneous sensation over the dorsum of the foot, as indicated by the letter A, is the _______ _________ nerve.

Choices:

• superficial fibular
• superficial peroneal

Answers:

• superficial fibular
• superficial peroneal

Comments:

• Correct
• That's right! The superficial fibular nerve provides cutaneous sensation to the dorsum of the foot.
• Continue

Question 23

23. The ______ _______ nerve is associated with dorsiflexion of the talocrural joint, inversion of the foot, and extension of the toes.

Choices:

• deep fibular
• deep peroneal

Answers:

• deep fibular
• deep peroneal

Comments:

• Correct
• That's right! The deep fibular nerve innervates muscles of the anterior compartment of the leg. Hence, it is responsible for dorsiflexion of the talocrural joint, inversion of foot and extension of toes.
• Continue

Question 24

24. The specific nerve branch responsible for cutaneous sensation in the first webspace of the toes, as indicated by the letter A, is the _______ _________ nerve.

Choices:

• deep fibular

Answers:

• deep fibular

Comments:

• Correct
• That's right! The deep fibular nerve provides cutaneous sensation in the first webspace of the toes.
• Continue