Forearm, Hand, Wrist Flashcards

1
Q

what 2 muscles supinate the forearm

A

biceps brachii

supinator

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2
Q

what muscles pronate the forearm

A

pronator teres

quadratus

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3
Q

what are the anterior flexor groups of the forearm

A

digital

thumb

wrist

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4
Q

what are the digital flexor muscles

A

superficial digital flexors

profunda digital flexors

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5
Q

what is the thumb flexor

A

flexor pollicis longus

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6
Q

what is the wrist flexor

A

flexor carpi radialis

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7
Q

what is the abductor of the thumb

A

abductor pollicis longus

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8
Q

what are the posterior extensor groups of the forearm

A

digital

thumb (pollicis)

wrist (carpi)

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9
Q

what are the digital extensor muscles

A

extensor digitorium

extensor digiti minimi

extensor indicis

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10
Q

what are the thumb extensors

A

extensor pollicis longus

extensor pollicis brevis

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11
Q

what are the extensors of the wrist

A

extensor carpi radialis longus

extensor carpi radialis brevis

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12
Q

carpal tunnel syndrome is compression of the

A

median n in the carpal tunnel

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13
Q

what are the symptoms of carpal tunnel syndrome

A

pain

numbness

tingling in the thumb, index, and middle finger - and thumb side of ring finger

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14
Q

what muscles are affected in carpal tunnel syndrome

A

thenar eminence muscles →

abductor pollicis brevis

flexor pollicis brevis

opponens pollicis

ABOF of ABOF

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15
Q

the anterior muscles of the forearm are divided into

A

intermediate

middle

superficialis

deep/profundus

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16
Q

which layer of of forearm muscles is the insertion for the distal phalanges

A

deep (profundus)

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17
Q

which layer of forearm muscles is the insertion for the middle phalanges

A

intermediate/middle/superficialis

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18
Q

what is the camper’s chiasm

A

the split that the profunda tendons go through

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19
Q

a supracondylar fracture can cause ischemia to the

A

anterior (flexor) compartment of the forearm

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20
Q

when would you see a “fat pad” sign on xray

A

radial fx

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21
Q

what is nursemaid’s elbow

A

subluxation of the radial head from the anular ligament

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22
Q

what is epicondylitis

A

inflammation of the extensor carpi radialis brevis

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23
Q

in compartment syndrome, you would see the 6 p’s with

A

passive extension of the compartment

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24
Q

the brachial artery is palpable along the length of the

A

anterior compartment of the forearm

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25
Q

which artery is used to measure blood pressure

A

brachial artery

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26
Q

at what landmark does the axillary vein become the basilic vein

A

clavicopectoral fossa

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27
Q

what 2 structures form the cubital fossa

A

brachioradialis

pronator teres

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28
Q

what are the contents of the cubital fossa

A

tendon and aponeurosis of biceps brachii

brachial artery

median nerve

median cubital vein

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29
Q

what is monteggia’s fx

A

fracture of proximal third of ulna and anterior dislocation of the radius at the elbow

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30
Q

what is galleazzi’s fracture

A

fracture of distal third of radius and sublucation of the distal head of the ulna

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31
Q

what is colle’s fracture

A

fracture if distal radius w. dorsal displacement of distal fragments

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32
Q

what is the TFCC

A

triangular fibrocartilage complex → articular disc btw distal radius, ulna, and wrist joint

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33
Q

what is the fxn and clinical significance of the TFCC

A

it stabilizes the radioulnar joint → tears can be painful and troublesome

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34
Q

the hand articulates primarily with the

A

radius

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35
Q

where do the extensors of the wrist and fingers originate

A

lateral epicondyle of the humerus

36
Q

where do the flexors of the wrist and gingers originate

A

medial epicondyle of the humerus

37
Q

the superficial muscles of the forearm originate from the

A

medial epicondyle

38
Q

what are the superficial flexors of the forearm

A

flexor carpi radialis

palmar longus

pronator teres

flexor carpi ulnaris

flexor digitorum superficialis

39
Q

what are the deep flexor muscles of the forearm

A

flexor digitorum profundus

flexor pollicis longus

pronator qudratus

40
Q

the dorsal compartment of the arm contains the

A

extensors

41
Q

all of the extensors of the forearm are innervated by the

A

radial nerve

42
Q

what are the superficial extensors of the forearm

A

extensor carpi radialis brevis

extensor digitorum

extensor digiti minimi

extensor carpi ulnaris

brachioradialis

extensor carpi radialis longus

43
Q

what are the deep extensors of the forearm

A

supinator

abductor pollicis longus

extensor pollicis brevis

extensor pollicis longus

extensor indici

44
Q

carpal tunnel syndrome involves loss of __ muscle fxn and mass

and is characterized by a positive __ sign

A

thenar

tinel’s

45
Q

what is the anatomical snuff box

A

extensor pollicis longus

extensor pollicis brevis

abductor pollicis longus

46
Q

what is the medial border of the anatomical snuff box

A

extensor pollicis longus

47
Q

what is the lateral border of the anatomical snuff box

A

extensor pollicis brevis

abductor pollicis longus

48
Q

what is the proximal border of the anatomical snuff box

A

radial styloid

49
Q

what is the floor of the anatomical snuff box

A

trapezium

scaphoid

50
Q

what vein overlies the anatomical snuff box

A

cephalic

51
Q

what muscles are responsible for the “tata” sign

A

lumbrical

52
Q

what nerves innervates the lumbrical muscles

A

ulnar n

medial n

53
Q

what structure allows for flexion at the MCP joints while maintaining extension of the interphalangeal joints

A

extensor hoods

54
Q

the __ nerve does not innervate intrinsic hand muscles

A

radial

55
Q

what 2 muscle groups are innervated by the median n instead of the ulnar n

A

thenar muscles

lateral lumbrical

56
Q

what are the muscles of the thumb

A

extensor pollicis longus

extensor pollicis brevis

abductor pollicis longus

flexor pollicis longus

57
Q

what n innervates the hypothenar muscles

A

ulnar n

58
Q

what nerve is the flexor, pronator, and thumb to finger approximator nerve

A

ulnar

59
Q

why is the median nerve to the thenar muscles known as the million dollar nerve

A

damage to his nerve during surgery can lead to a million dollar law suit

60
Q

which artery supplies the deep palmar arch

A

radial

61
Q

which artery supplies the superficial palmar arch

A

ulnar

62
Q

what nerve runs alongside the ulnar artery

A

median

63
Q

what n descends between the brachialis m and brachioradialis m

A

radial n

64
Q

what nerve runs posteromedial through the cubital tunnel

A

ulnar

65
Q

what fracture can cause median n and/or brachial artery damage if displaced medially and radial n injury if displaced laterally

A

supracondylar fracture

66
Q

what n runs through the medial epicondyle

A

ulnar

67
Q

what n can become trapped in the cubital tunnel causing numbness, tingling, and proximal n findings

A

ulnar

68
Q

little leaguers elbow causes damage to the __

2/2 to __

A

medial epicondyle

tension on forearm flexor muscles

69
Q

golfers elbow is damage to the __

2/2 to

A

medial epicondyle

overload of flexor pronator group

70
Q

tennis elbow is caused by partial tears of the __

A

extensor group of tendons

+/- partial avulsion of radial collateral ligament

71
Q

what is smith’s fx

A

fx of the distal radial metaphysis

72
Q

what are the 3 functional joints of the wrist

A

radia-carpal joint

mid-carpal joint

carpal-metacarpal joint

73
Q

which carpal row is the scaphoid attached to

A

both!

74
Q

why is the scaphoid prone to fracture

A

it is attached to both carpal rows so it moves with flexion and extension → can break w. hyperextension and/or hyperflexion

75
Q

where does the scaphoid bone fx

A

at its waist

76
Q

what is the most sensitive imaging to detect scaphoid fx

A

MRI

77
Q

how does avascular necrosis occur after a scaphoid fx

A

fx cuts off blood supply to the proximal scaphoid bone

78
Q

what artery supplies the scaphoid bone

A

radial

79
Q

the deep arch is supplied by the __ artery, which supplies the

A

radial

thumb and lateral index finger

80
Q

the superficial arch is supplied by the __ artery,

which supplies the

A

ulnar

medial index finger; 3rd, 4th, 5th fingers

81
Q

what artery creates the deep palmar arch

A

radial artery

82
Q

what artery creates the superficial palmar arch

A

ulnar artery

83
Q

what artery supplies the dorsal arch

A

radial

84
Q

what test give you information as to which arch is dominant

A

allen’s test

85
Q

what is hypothenar hammer syndrome

A

repetitive trauma to the heel of the hand (ex construction worker) → reduced blood flow and ischemia to 3th, 4th, 5th fingers → numb, cool, cyanosis, delayed cap refill, thrombosis, obstruction of ulnar n

86
Q

what tests allows you to see ulnar artery thrombosis in hypothenar syndrome

A

arteriogram