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Committee Exam 4 > Muscles of Forearm > Flashcards

Muscles of Forearm Flashcards

1
Q

Forearm (antebrachium) is the region of upper limb between the _______ and ___________

A

Elbow and wrist joints

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2
Q

Forearm is divided into _____ compartments

A

TWO

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3
Q

What is the function of muscles of anterior compartment?

A

Anterior compartment contains muscles that flex the wrist and digits; pronate the hand

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4
Q

What is the function of muscles of posterior compartment?

A

Posterior compartment contains muscles that extend the wrist and digits; supinate the hand

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5
Q

Which of the following is NOT the layer of anterior compartment of forearm;
a) Superficial
b) Intermediate
c) Muscular
d) Deep

A

Muscular

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6
Q

What is the origin of the Flexor Carpi Ulnaris muscle?
a) Medial epicondyle of humerus
b) Lateral epicondyle of humerus
c) Styloid process of radius
d) Styloid process of ulna

A

Medial epicondyle of humerus

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7
Q

What is the insertion of the Flexor Carpi Ulnaris muscle?
a) Lateral epicondyle of humerus
b) Medial epicondyle of humerus
c) Carpals and fifth metacarpal bone
d) Scaphoid and trapezium bones

A

Carpals and fifth metacarpal bone

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8
Q

Which nerve innervates the Flexor Carpi Ulnaris muscle?

A

Ulnar nerve

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9
Q

Which action is primarily performed by the Flexor Carpi Ulnaris muscle?
a) Flexion of the wrist
b) Extension of the wrist
c) Abduction of the wrist
d) Adduction of the wrist

A

Adduction of the wrist

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10
Q

Which anatomical structure does the Flexor Carpi Ulnaris muscle pass through?
a) Carpal tunnel
b) Ulnar groove
c) Radial groove
d) Intertubercular groove.

A

Ulnar groove

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11
Q

What is the origin of the Palmaris longus muscle?
a) Medial epicondyle of humerus
b) Lateral epicondyle of humerus
c) Flexor retinaculum
d) Ulnar collateral ligament

A

Medial epicondyle of humerus

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12
Q

What is the insertion of the Palmaris longus muscle?
a) Flexor retinaculum
b) Base of the first metacarpal bone
c) Base of the second metacarpal bone
d) Pisiform bone

A

Base of the second metacarpal bone

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13
Q

Which nerve innervates the Palmaris longus muscle?

A

Median nerve

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14
Q

Which action is primarily performed by the Palmaris longus muscle?
a) Flexion of the wrist
b) Extension of the wrist
c) Pronation of the forearm
d) Supination of the forearm

A

Flexion of the wrist

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15
Q

What is the Palmar aponeurosis?
a) A tendon of the Palmaris longus muscle
b) A ligament in the wrist joint
c) A fascial sheet covering the palm of the hand
d) A bursa located near the thumb

A

A fascial sheet covering the palm of the hand

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16
Q

Which of the following structures is not attached to the Palmar aponeurosis?
a) Flexor tendons
b) Skin of the palm
c) Superficial transverse metacarpal ligament
d) Extensor tendons

A

Extensor tendons

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17
Q

What is the function of the Palmar aponeurosis?
a) To provide attachment for muscles and ligaments
b) To protect the underlying structures of the hand
c) To facilitate movement of the fingers
d) To provide sensory feedback to the brain

A

To provide attachment for muscles and ligaments

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18
Q

Which layer of the skin is closely adhered to Palmar aponeurosis?

A

Dermis

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19
Q

Which of the following structures is not covered by Palmar aponeurosis?
a) Flexor retinaculum
b) Thenar eminence
c) Hypothenar eminence
d) Palmaris brevis muscle

A

Flexor retinaculum

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20
Q

What is the origin of the Flexor carpi radialis muscle?

A

Medial epicondyle of the humerus.

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21
Q

__________ nerve innervates the Flexor carpi radialis muscle.

A

Median

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22
Q

Which of the following movements is primarily performed by the Flexor carpi radialis muscle?
a) Extension of the wrist
b) Abduction of the wrist
c) Adduction of the wrist
d) Flexion of the elbow

A

Adduction of the wrist.

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23
Q

What is the origin of the Pronator teres muscle?
a) Medial epicondyle of the humerus and coronoid process of the ulna
b) Lateral epicondyle of the humerus and radial head
c) Medial epicondyle of the humerus and radial head
d) Coronoid process of the ulna and radial head

A

Medial epicondyle of the humerus and coronoid process of the ulna.

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24
Q

What is the insertion of the Pronator teres muscle?

A

Lateral surface of midshaft of radius

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25
Q

Which of the following movements is primarily performed by the Pronator teres muscle?
a) Extension of the wrist
b) Abduction of the wrist
c) Adduction of the wrist
d) Pronation of the forearm

A

Pronation of the forearm.

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26
Q

What is the origin of the Flexor digitorum superficialis muscle?

A

Medial epicondyle of the humerus and coronoid process of the ulna.

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27
Q

Which of the following movements is primarily performed by the Flexor digitorum superficialis muscle?
a) Flexion of the elbow
b) Extension of the elbow
c) Flexion of the wrist
d) Flexion of the fingers

A

Flexion of the fingers.

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28
Q

What is the origin of the Flexor digitorum profundus muscle?
a) Medial epicondyle of the humerus and coronoid process of the ulna
b) Lateral epicondyle of the humerus and radial head
c) Medial epicondyle of the humerus and radial head
d) Coronoid process of the ulna and radial head

A

Medial epicondyle of the humerus and coronoid process of the ulna.

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29
Q

Which nerve innervates the Flexor digitorum profundus muscle?

A

Ulnar nerve

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30
Q

The movement primarily performed by the Flexor digitorum profundus muscle is flexion of the fingers. True or false?

A

True

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31
Q

What is the origin of the Flexor pollicis longus muscle?
a) Medial epicondyle of the humerus and coronoid process of the ulna
b) Anterior surface of the radius and interosseous membrane
c) Lateral epicondyle of the humerus and radial head
d) Coronoid process of the ulna and radial head

A

Anterior surface of the radius and interosseous membrane.

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32
Q

Which of the following movements is primarily performed by the Flexor pollicis longus muscle?

A

Helps in flexion of the wrist joint, metacarpophalangeal joint of the thumb and interphalangeal (IP) joint of the thumb

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33
Q

Which bone does the Pronator quadratus muscle connect?
a) Humerus and radius
b) Ulna and radius
c) Humerus and ulna
d) Radius and carpal bones

A

Ulna and radius.

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34
Q

What is the origin of Pronator quadratus muscle?

A

Linear ridge on the distal anterior surface of the ulna

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35
Q

Which of the following movements is primarily performed by the Pronator quadratus muscle?
a) Pronation of the forearm
b) Supination of the forearm
c) Flexion of the elbow
d) Extension of the elbow

A

Pronation of the forearm.

36
Q

Which of the following muscles is located in the forearm but classified as a muscle of the arm?
a) Flexor carpi radialis
b) Brachialis
c) Brachioradialis
d) Pronator teres

A

Brachioradialis.

37
Q

Ulnar nerve innervates the Brachioradialis muscle. True or false?

A

False. Radial nerve

38
Q

Which of the following movements is primarily performed by the Brachioradialis muscle?
a) Flexion of the elbow
b) Extension of the elbow
c) Pronation of the forearm
d) Supination of the forearm

A

Flexion of the elbow.

39
Q

Which bone does the Brachioradialis muscle originate from?

A

Humerus.

40
Q

Which of the following muscles is responsible for extending the wrist and abducting the hand?
a) Extensor digitorum
b) Extensor carpi radialis brevis
c) Extensor carpi radialis longus
d) Extensor carpi ulnaris

A

Extensor carpi radialis longus.

41
Q

Extensor carpi radialis longus muscle originate from?

A

Distal part of the lateral supra-epicondylar ridge of humerus

42
Q

Which of the following structures does the Extensor carpi radialis longus muscle insert onto?
a) Radial tuberosity
b) Ulnar tuberosity
c) Styloid process of the radius
d) Carpal bones

A

Carpal bones.

43
Q

Which movements are primarily performed by the Extensor carpi radialis longus muscle?

A

Extends and abducts (radial deviation) the wrist

44
Q

Which of the following muscles is responsible for extending the wrist and abducting the hand?

A

Extensor carpi radialis brevis.

45
Q

_________ nerve innervates the Extensor carpi radialis brevis muscle

A

Radial nerve.

46
Q

Where does the Extensor carpi radialis brevis muscle originate from?

A

Lateral epicondyle of humerus

47
Q

Which of the following structures does the Extensor carpi radialis brevis muscle insert onto?
a) Radial tuberosity
b) Ulnar tuberosity
c) Styloid process of the radius
d) Carpal bones

A

Styloid process of the radius.

48
Q

Which movements is primarily performed by the Extensor carpi radialis brevis muscle?

A

Extends and abducts (radial deviation) the wrist

49
Q

Which muscle is responsible for extending the fingers at the metacarpophalangeal and interphalangeal joints?
a) Flexor digitorum profundus
b) Flexor digitorum superficialis
c) Extensor digitorum
d) Extensor pollicis longus

A

Extensor digitorum

50
Q

Which structures does the Extensor digitorum muscle insert onto?

A

Extensor expansion of the digits.

51
Q

Which of the following movements is primarily performed by the Extensor digitorum muscle?
a) Flexion of the wrist
b) Extension of the wrist
c) Pronation of the forearm
d) Finger extension

A

Finger extension.

52
Q

Which muscle is responsible for extending the fifth digit of the hand?

A

Extensor digiti minimi.

53
Q

Ulnar nerve innervates the Extensor digiti minimi muscle. True or false?

A

True

54
Q

Which of the following structures does the Extensor digiti minimi muscle insert onto?
a) Radial tuberosity
b) Ulnar tuberosity
c) Extensor expansion of the digits
d) Carpal bones

A

Extensor expansion of the digits.

55
Q

Which muscle is responsible for extending and adducting the wrist?
a) Flexor carpi ulnaris
b) Extensor carpi ulnaris
c) Brachioradialis
d) Pronator teres

A

Extensor carpi ulnaris.

56
Q

Which of the following bones does the Extensor carpi ulnaris muscle originate from?
a) Humerus
b) Radius
c) Ulna
d) Carpals

A

Ulna

57
Q

Which of the following structures does the Extensor carpi ulnaris muscle insert onto?
a) Radial tuberosity
b) Ulnar tuberosity
c) Extensor expansion of the digits
d) Tubercle on the base of the
metacarpal V

A

Tubercle on the base of the
metacarpal V

58
Q

___________ muscle is the continuation of the triceps brachii muscle.

A

Anconeus muscle

59
Q

Anconeus muscle originates from?

A

Lateral epicondyle of
humerus

60
Q

Anconeus muscle is inserted into?

A

Olecranon and proximal
posterior surface of ulna

61
Q

Which nerve innervates the Anconeus muscle?

A

Radial nerve

62
Q

What is the function of Anconeus muscle?

A

Abduction of the ulna in pronation

63
Q

Which muscle is responsible for supination of the forearm?
a) Pronator teres
b) Flexor carpi ulnaris
c) Supinator
d) Brachioradialis

A

Supinator.

64
Q

Which of the following bones does the Supinator muscle originate from?
a) Humerus
b) Radius
c) Ulna
d) Carpals

A

Radius.

65
Q

Which of the following structures does the Supinator muscle insert onto?
a) Radial tuberosity
b) Ulnar tuberosity
c) Lateral epicondyle of the humerus
d) Carpals

A

Ulnar tuberosity.

66
Q

Which nerve innervates the Supinator muscle?

A

Posterior interosseous nerve

67
Q

Radial nerve innervates the Abductor pollicis longus muscle. True or false?

A

True

68
Q

Which of the following structures does the Abductor pollicis longus muscle insert onto?
a) Radial tuberosity
b) Ulnar tuberosity
c) Lateral epicondyle of the humerus
d) Base of the first metacarpal bone

A

Base of the first metacarpal bone.

69
Q

Which of the following movements is primarily performed by the Abductor pollicis longus muscle?
a) Flexion of the wrist
b) Extension of the wrist
c) Abduction of the thumb
d) Adduction of the thumb

A

Abduction of the thumb.

70
Q

Which nerve innervates the Extensor pollicis brevis muscle?

A

Radial nerve.

71
Q

Which of the following structures does the Extensor pollicis brevis muscle insert onto?
a) Radial tuberosity
b) Ulnar tuberosity
c) Lateral epicondyle of the humerus
d) Base of the distal phalanx of the thumb

A

Base of the distal phalanx of the thumb.

72
Q

Which of the following movements is primarily performed by the Extensor pollicis brevis muscle?
a) Flexion of the wrist
b) Extension of the wrist
c) Abduction of the thumb
d) Adduction of the thumb

A

Extension of the wrist

73
Q

Which muscle is responsible for extension of the thumb?
a) Extensor pollicis brevis
b) Abductor pollicis longus
c) Flexor pollicis longus
d) Extensor pollicis longus

A

Extensor pollicis longus.

74
Q

Which bones does the Extensor pollicis longus muscle originate from?

A

Ulna

75
Q

Where does the Extensor pollicis longus muscle insert onto?

A

Dorsal surface of the base of
the distal phalanx of the
thumb

76
Q

What is the origin of the Extensor indicis muscle?
a) Medial epicondyle of humerus
b) Lateral epicondyle of humerus
c) Posterior border of ulna
d) Interosseous membrane

A

Interosseous membrane

77
Q

Which nerve innervates the Extensor indicis muscle?

A

Posterior interosseous nerve

78
Q

What is the action of the Extensor indicis muscle?

A

Extension of the index finger

79
Q

What is the anatomical snuff box?

A

A triangular depression on the dorsum of the hand

80
Q

Which bone forms the posterior border of the anatomical snuff box?
a) Scaphoid bone
b) Trapezium bone
c) Pisiform bone
d) Hamate bone

A

Scaphoid bone

81
Q

Extensor carpi ulnaris muscle is located at the base of the anatomical snuff box. True or false?

A

False. Extensor carpi radialis brevis muscle is located at the base of the anatomical snuff box.

82
Q

Which nerve innervates the muscles that surround the anatomical snuff box?

A

Radial nerve.

83
Q

What is the clinical significance of the anatomical snuff box?
a) It is a common site for bone fractures
b) It is a common site for tendonitis
c) It is a common site for nerve entrapment
d) All of the above

A

All of the above.

84
Q

What is Anatomical snuffbox called in Latin?

A

Fovea radialis in Latin

85
Q

Floor of anatomical snuff box is formed by ___________ and _________

A

scaphoid and trapezium

Committee Exam 4 (35 decks)

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