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Committee Exam 4 > Muscles of Hand > Flashcards

Muscles of Hand Flashcards

1
Q

______ is NOT a part of hand:
a) Wrist (carpus)
b) Metacarpus
c) Metatarsals
d) Fingers (digits)

A

Metatarsals

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2
Q

Define hand?

A

Hand is the region of upper limb distal to the wrist joint

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3
Q

Abduction and adduction of the fingers are defined with respect to the long axis of the middle finger. True or false?

A

True

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4
Q

Thenar eminence is innervated by _______ nerve

A

Median nerve

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5
Q

Function of Thenar eminence is?

A

Movement of the thumb

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6
Q

Hypothenar eminence is innervated by _______ nerve

A

Ulnar nerve

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7
Q

Function of Hypothenar eminence is?

A

Movement of the little finger

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8
Q

Carpal bones form an arch called _______ arch

A

Carpal arch

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9
Q

What are the primary ligaments of the hand?
a) Radial and ulnar collateral ligaments
b) Radial and ulnar collateral ligaments and the palmar radiocarpal ligament
c) Radial and ulnar collateral ligaments and the dorsal radiocarpal ligament
d) Radial and ulnar collateral ligaments and the transverse carpal ligament

A

Radial and ulnar collateral ligaments and the palmar radiocarpal ligament

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10
Q

Flexor retinaculum attaches to the anterior side and forms the carpal tunnel. True or false?

A

True

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11
Q

Which of the following is NOT the content of carpal tunnel?
a) Tendons of flexor digitorum superficialis
b) Tendons of flexor digitorum profundus
c) Tendon of flexor pollicis longus
d) Ulnar nerve

A

Ulnar nerve.

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12
Q

Which nerve is the content of carpal tunnel?

A

Median nerve.

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13
Q

What nerve is compressed in carpal tunnel syndrome?
a) Ulnar nerve
b) Radial nerve
c) Median nerve
d) Sciatic nerve

A

Median nerve.

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14
Q

What is the most common cause of carpal tunnel syndrome?
a) Arthritis
b) Diabetes
c) Repetitive hand motions
d) Trauma

A

Repetitive hand motions

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15
Q

What are common symptoms of carpal tunnel syndrome?
a) Tingling and numbness in the hand
b) Weakness in the hand
c) Pain in the wrist and forearm
d) All of the above

A

All of the above

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16
Q

_________ sheaths hold the tendons to the bony plane and prevent the tendons from bowing when the digits are flexed.

A

Fibrous sheaths

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17
Q

Fibrous sheath is formed by _______ and ________ ligaments.

A

Annular and cruciate ligaments

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18
Q

What is the function of Synovial sheaths?

A

Reduce friction between tendon and osseofibrous tunnels

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19
Q

Ulnar bursa contains tendons of:
a) the flexor digitorum superficialis and profundus
b) extensor digitorum superficialis only
c) biceps brachii and extensor digiti minimi
d) extensor pollicis longus and abductor pollicis brevis

A

the flexor digitorum superficialis and profundus

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20
Q

Extensor retinaculum is thickened part of the superficial fascia that holds the extensor tendons in place. True or false?

A

False. Extensor retinaculum is thickened part of the antebrachial fascia

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21
Q

Extensor pollicis longus tendon crosses the ___________ muscle and _______ tendon.

A

extensor carpi radialis brevis and longus tendons

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22
Q

Extensor tendon compartment 1 of the wrist has:
a) Extensor carpi radialis longus and brevis tendons
b) Abductor pollicis longus and extensor pollicis brevis tendons
c) Extensor digiti minimi tendon
d) Extensor digitorum and extensor indicis tendons

A

Abductor pollicis longus and extensor pollicis brevis tendons

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23
Q

Extensor tendon compartment 2 of the wrist has:
a) Extensor carpi radialis longus and brevis tendons
b) Abductor pollicis longus and extensor pollicis brevis tendons
c) Extensor digiti minimi tendon
d) Extensor digitorum and extensor indicis tendons

A

Extensor carpi radialis longus and brevis tendons

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24
Q

Extensor tendon compartment 5 of the wrist has:
a) Extensor carpi radialis longus and brevis tendons
b) Abductor pollicis longus and extensor pollicis brevis tendons
c) Extensor digiti minimi tendon
d) Extensor digitorum and extensor indicis tendons

A

Extensor digiti minimi tendon

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25
Q

Extensor tendon compartment 3 of the wrist has:
a) Extensor carpi radialis longus and brevis tendons
b) Abductor pollicis longus and extensor pollicis brevis tendons
c) Extensor pollicis longus tendon
d) Extensor digitorum and extensor indicis tendons

A

Extensor pollicis longus tendon

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26
Q

Extensor tendon compartment 4 of the wrist has:
a) Extensor digitorum and extensor indicis tendons
b) Extensor carpi ulnaris
c) Extensor pollicis longus tendon
d) Extensor digitorum and extensor indicis tendons

A

Extensor digitorum and extensor indicis tendons

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27
Q

Extensor tendon compartment 6 of the wrist has:
a) Extensor digitorum and extensor indicis tendons
b) Extensor carpi ulnaris
c) Extensor pollicis longus tendon
d) Extensor digitorum and extensor indicis tendons

A

Extensor carpi ulnaris

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28
Q

The Palmar aponeurosis is a ____________ structure located in the palm of the hand

A

Fibrous

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29
Q

Palmar aponeurosis is continuous with the _____________, which is a thick band of tissue on the wrist.

A

Fascia

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30
Q

Palmar aponeurosis provides protection and support to the underlying structures of the palm, and helps maintain the shape and contour of the hand. True or false?

A

True

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31
Q

The Palmar aponeurosis is an important anatomical landmark, as it contains the _____________, which is a superficial vein used for medical procedures.

A

Cephalic vein

32
Q

What is the function of the Palmaris brevis muscle?
a) To flex the wrist
b) To extend the fingers
c) To adduct the thumb
d) To wrinkle the skin on the palm of the hand

A

To wrinkle the skin on the palm of the hand

33
Q

Which nerve innervates the Palmaris brevis muscle?

A

Ulnar nerve

34
Q

Which of the following is NOT a common clinical use of the Palmaris brevis muscle?
a) Assessing ulnar nerve function
b) Diagnosing carpal tunnel syndrome
c) Assessing hand strength
d) Assessing hand sensation

A

Diagnosing carpal tunnel syndrome

35
Q

In what percentage of the population is the Palmaris brevis muscle absent?

A

75%

36
Q

How many Dorsal interossei muscles are there in the hand?

A

4

37
Q

What is the function of the Dorsal interossei muscles?
a) To flex the fingers
b) To extend the fingers
c) To abduct the fingers
d) To adduct the fingers

A

To abduct the fingers

38
Q

Which of the following is not a Dorsal interossei muscle?
a) Dorsal interosseous muscle of the thumb
b) Dorsal interosseous muscle of the index finger
c) Dorsal interosseous muscle of the middle finger
d) Dorsal interosseous muscle of the ring finger

A

Dorsal interosseous muscle of the thumb

39
Q

The ________ palmar interosseous muscle is rudimentary.

A

First

40
Q

How many Palmar interossei muscles are there in the hand?
a) 2
b) 3
c) 4
d) 5

A

3

41
Q

What is the function of the Palmar interossei muscles?
a) To flex the fingers
b) To extend the fingers
c) To abduct the fingers
d) To adduct the fingers

A

To adduct the fingers

42
Q

Which nerve innervates the Palmar interossei muscles?

A

Ulnar nerve

43
Q

Which fingers do the Palmar interossei muscles adduct?
a) Index and middle fingers
b) Middle and ring fingers
c) Ring and little fingers
d) All of the above

A

All of the above

44
Q

Which of the following is not a part of the Adductor pollicis muscle?
a) Oblique head
b) Transverse head
c) Long head
d) Short head

A

Long head

45
Q

Which muscle opposes the action of the Adductor pollicis muscle?
a) Abductor pollicis longus
b) Extensor pollicis longus
c) Flexor pollicis longus
d) Opponens pollicis

A

Abductor pollicis longus

46
Q

_________ nerve innervates the Adductor pollicis muscle

A

Ulnar nerve

47
Q

What is the function of the Adductor pollicis muscle?

A

To adduct the thumb

48
Q

How many Lumbrical muscles are there in the hand?
a) 2
b) 3
c) 4
d) 5

A

4

49
Q

What is the function of the Lumbrical muscles?
a) To flex the fingers
b) To extend the fingers
c) To adduct the fingers
d) To assist in finger extension and flexion

A

To assist in finger extension and flexion

50
Q

Which nerve innervates the Lumbrical muscles?

A

Medial two lumbricals by ulnar nerve
Lateral two lumbricals by median nerve

51
Q

Which fingers do the Lumbrical muscles originate from?
a) Index and middle fingers
b) Middle and ring fingers
c) Ring and little fingers
d) All of the above

A

Middle and ring fingers

52
Q

Which muscle is responsible for the flexion of the MCP joint during extension of the IP joint?
a) Flexor digitorum superficialis
b) Flexor digitorum profundus
c) Lumbrical muscles
d) Flexor pollicis longus

A

Lumbrical muscles

53
Q

Most superficial muscle of the thenar region is?

A

Abductor pollicis brevis muscle

54
Q

What is the function of the Abductor pollicis brevis muscle?

A

To abduct the thumb

55
Q

Which nerve innervates the Abductor pollicis brevis muscle?
a) Median nerve
b) Ulnar nerve
c) Radial nerve
d) Musculocutaneous nerve

A

Median nerve

56
Q

Which of the following is not a part of the Abductor pollicis brevis muscle?
a) Oblique head
b) Transverse head
c) Long head
d) None of the above

A

None of the above

57
Q

What is the function of the Flexor pollicis brevis muscle?

A

To flex the thumb

58
Q

Which of the following is not a part of the Flexor pollicis brevis muscle?
a) Superficial head
b) Deep head
c) Middle head
d) All of the above are part of the muscle

A

Middle head

59
Q

Insertion of Flexor pollicis brevis muscle is?

A

Proximal phalanx of the thumb

60
Q

Which nerve innervates the Flexor pollicis brevis muscle?

A

Median nerve

61
Q

Deepest and largest muscle of the thenar region is?

A

Opponens pollicis muscle

62
Q

What is the function of the Opponens pollicis muscle?
a) To extend the wrist
b) To abduct the fingers
c) To adduct the fingers
d) Medial rotation of the thumb

A

Medial rotation of the thumb

63
Q

Which of the following is NOT a thenar muscle?
a) Flexor pollicis brevis muscle
b) Abductor digiti minimi muscle
c) Abductor pollicis brevis muscle
d) Opponens pollicis muscle

A

Abductor digiti minimi muscle

64
Q

Most superficial muscle of the hypothenar region is __________

A

Abductor digiti minimi muscle

65
Q

Which nerve innervates the Abductor digiti minimi muscle?

A

Ulnar nerve

66
Q

What is the function of the Abductor digiti minimi muscle?

A

To abduct the little finger

67
Q

Origin of Flexor digiti minimi brevis is?

A

Hook of the hamate
Flexor retinaculum

68
Q

The function of the Flexor digiti minimi brevis muscle is to flex the little finger. True or false?

A

True

69
Q

Which muscle opposes the action of the Flexor digiti minimi brevis muscle?
a) Extensor digiti minimi
b) Abductor digiti minimi
c) Adductor pollicis
d) Abductor pollicis brevis

A

Extensor digiti minimi

70
Q

_________ muscle is a rare anatomical variation and not found in humans

A

Flexor digiti minimi longus muscle

71
Q

What is the function of the Opponens digiti minimi muscle?
a) To extend the wrist
b) To abduct the fingers
c) To oppose the little finger
d) To flex the thumb

A

To oppose the little finger

72
Q

Which nerve innervates the Opponens digiti minimi muscle?

A

Ulnar nerve

73
Q

Which of the following is not a part of the Opponens digiti minimi muscle?
a) Superficial head
b) Deep head
c) Tendinous slip
d) All of the above are part of the muscle

A

All of the above are part of the muscle

74
Q

Which muscle opposes the action of the Opponens digiti minimi muscle?
a) Extensor digiti minimi
b) Abductor digiti minimi
c) Adductor pollicis
d) Abductor pollicis brevis

A

Abductor digiti minimi

75
Q

Name the hypothenar muscles of hand?

A

Abductor digiti minimi
Flexor digiti minimi brevis
Opponens digiti minimi

Committee Exam 4 (35 decks)

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