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MED221A/B Lectures > MSK 06 - Arm and cubital fossa > Flashcards

MSK 06 - Arm and cubital fossa Flashcards

1
Q

what nerve innervates the deltoid muscle

A

axillary artery

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2
Q

what structure does the cephalic vein go through

A

the deltoidpectoral triangle and groove

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3
Q

what are the 3 parts of the deltoid muscle

A

anterior
posterior
middle

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4
Q

what is the insertion of the deltoid muscle

A

deltoid tubercle for all fibres

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5
Q

what is the origin of the anterior deltoid muscle fibres

A

clavicle

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6
Q

what is the origin of the middle deltoid muscle fibres

A

acromion

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7
Q

what is the origin of the posterior deltoid muscle fibres

A

spine of scapula

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8
Q

what does the anterior fibres of the deltoid muscle do - 3 things

A

flex shoulder

internally rotate arm

abduct/adduct arm depending on arm position (more of an adductor than abductor)

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9
Q

what does the middle fibres of the deltoid muscle do

A

abduct arm

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10
Q

what does the posterior fibres of the deltoid muscle do - 3 things

A

extend shoulder

externally rotate arm

abduct/adduct arm depending on arm position (more of an adductor than abductor)

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11
Q

what nerve innervates teres major

A

lower subscapular nerve

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12
Q

what is the origin and insertion of teres major

A

origin = inferior angle and lateral border of scapula (posterior)

insertion = medial lip of intertubercular groove (anterior)

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13
Q

what artery/vein division does the teres major mark

A

axillary to brachial and vice versa

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14
Q

what is the action of teres major - 2 things

A

internal rotation of arm

adducts shoulder

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15
Q

what muscle inserts on the humerus opposite the deltoid tuberosity

A

coracobrachialis

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16
Q

what nerve innervates the anterior compartment of the arm

A

musculocutaneous nerve

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17
Q

what nerve innervates the posterior compartment of the arm

A

radial nerve

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18
Q

what nerve innervates the posterior compartment of the forearm

A

radial nerve

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19
Q

what nerve innervates the anterior compartment of the forearm

A

musculocutaneous nerve

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20
Q

what nerve innervates the lateral compartment of the forearm

A

radial nerve

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21
Q

what nerve innervates the medial compartment of the forearm

A

mostly median nerve but also some ulnar nerve

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22
Q

what is the lateral compartment in terms of flex/ext

A

extensors

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23
Q

what is the medial compartment in terms of flex/ext

A

flexors

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24
Q

what compartment of the arm and forearm does the musculocutaneous nerve innervate

A

arm = anterior

forearm = anterior

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25
Q

what compartment of the arm and forearm does the radial nerve innervate

A

arm = posterior

forearm = lateral and posterior

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26
Q

what compartment of the arm and forearm does the ulnar nerve innervate

A

arm = none

forearm = some medial

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27
Q

what compartment of the arm and forearm does the median nerve innervate

A

arm = none

forearm = most of medial

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28
Q

where is the attachment of the common flexor tendon of the forearm

A

medial epicondyle

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29
Q

where is the attachment of the common extensor tendon of the forearm

A

lateral epicondyle

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30
Q

what is the muscle that inserts about the medial epicondyle

A

pronator teres

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31
Q

what nerve innervates pronator teres

A

median

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32
Q

what nerve innervates the common flexor tendon

A

mostly median but some ulnar

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33
Q

what nerve innervates the common extensor tendon

A

radial

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34
Q

what are the two muscles that insert above the lateral epicondyle

A

most superior = brachioradialis

more inferior of the two = extensor carpi radialis longus (ECRL)

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35
Q

what nerve innervates brachioradialis and ECRL

A

radial

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36
Q

what nerves innervate biceps brachii

A

musculocutaneous nerve

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37
Q

what nerves innervate brachialis

A

musculocutaneous nerve

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38
Q

what attaches onto the lateral/medial intermuscular septa

A

muscles of the forearm

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39
Q

what is the action of bicep brachii - 3 things

A

elboe flexor

supinator

shoulder flexion

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40
Q

what are the origins and insertions of bicep brachii

A

origin = coracoid (short head) and supraglenoid tubercle (long head)

insertion = radial tuberosity and bicipital aponeurosis

41
Q

what innervates coracobrachialis

A

musculocutaneous nerve

42
Q

what actions does coracobrachialis do - 2 things

A

adducts shoulder

flexes shoulder

43
Q

where is the origin and insertion of coracobrachialis

A

origin = coracoid

insertion = medial side of humerus (opposite deltoid tuberosity)

44
Q

what is the action of brachialis

A

main elbow flexor

45
Q

what is the origin and insertion of brachialis

A

origin = anterior surface of distal humerus (including muscular septa)

insertion = ulna tuberosity

46
Q

what are shunt muscles

A

prevent unwanted inferior movement of HOH at shoulder joint during loading

47
Q

what are 4 examples of shunt muscles

A

deltoid

short head brachialis

coracobrachialis

long head triceps

48
Q

what innervates tricep brachii

A

radial nerve

49
Q

what is the origin and insertions of tricep brachii

A

origin = infraglenoid tubercle (long head), mid humerus (medial head), proximal humerus (lateral head)

insertion = olecranon

50
Q

what is the muscle that originates form the lateral epicondyle distal to triceps

A

anconeus

51
Q

what actions does triceps cause - 3 things

A

elbow extensor

shoulder adductor

shoulder extensor

52
Q

what muscle does the musculocutaneous nerve dive into in the forearm

A

coracobrachialis

53
Q

once the musculocutaneous nerve has finished its motor supply what cutaneous nerve does it become

A

lateral cutaneous nerve of forearm

54
Q

what two nerve only travel on the anterior arm and forearm

A

musculocutaneous nerve and median nerve

55
Q

what does the median nerve supply in the arm

A

nothing

56
Q

what is the ulnar nerves path down the arm and forearm

A

down medial anterior of arm

passes under medial intermuscular septum and runs behind medial epicondyle

then turns anterior again down the forearm

57
Q

what is the radial nerves path down the arm and forearm

A

down posterior arm in radial groove

turns anterior at the lateral epicondyle and becomes posterior again ?

58
Q

what does the median nerve enter the cubital fossa under

A

under the bicepetal aponeurosis

59
Q

what are the 3 spaces made up by muscle borders in the posterior shoulder region

A

quadrangular space

triangular space

triangular interval

60
Q

how many structures run through the quadrangular space and what are they

A

2

axillary nerve

posterior circumflex humeral artery and vein

61
Q

how many structures run through the triangular space and what are they

A

1

circumflex scapular artery

62
Q

how many structures run through the triangular interval and what are they

A

2

profunda brachii artery

radial nerve

63
Q

what 3 structures mark the borders of the triangular space

A

teres major (laterally)

lateral scapular border (medially)

long head tricep brachii (superiorly)

64
Q

what 3 structures mark the borders of the triangular interval

A

long head tricep brachii (medially)

teres major (superiorly)

humerus (laterally)

65
Q

what 4 structures mark the borders of the quadrangular space

A

humeral head (superiorly)

long head tricep brachii (medially)

humerus (laterally)

teres major (inferiorly)

66
Q

what space does the radial nerve travel through

A

triangular interval

67
Q

what space does the axillary nerve travel through

A

quadrangular space

68
Q

what space does the posterior circumflex humeral artery travel through

A

quadrangular space

69
Q

what space does the circumflex scapular artery travel through

A

triangular space

70
Q

what space does the profunda brachii artery travel through

A

triangular interval

71
Q

what two branches come off the axillary artery at its proximal end

A

ant and post humeral circumflex arteries

72
Q

what does the axillary artery become more distally

A

brachial artery

73
Q

what is the profunda brachii artery in terms of where in branches from and where it runs in the arm

A

branch off axillary artery

runs posterior to humerus

74
Q

what are the 2 main branches the brachial artery becomes

A

ulnar (medial) and radial (lateral) arteries

75
Q

what does the profunda brachii artery supply

A

everything in back of arm

76
Q

what do recurrent vessels allow

A

flow against conventional current flow - goes from distal to proximal = allows alternative flow around the periphery

anastomoses with collateral vessels

77
Q

what do the collateral arteries anastomose with

A

reccurent arteries

78
Q

what makes up the superior border of the cubital fossa

A

imaginary line between lateral and medial epicondyles

79
Q

what makes up the medial border of the cubital fossa

A

pronator terres

80
Q

what makes up the lateral border of the cubital fossa

A

bracioradialis

81
Q

what makes up the floor of the cubital fossa

A

brachialis

82
Q

what makes up the roof of the cubital fossa

A

bicep brachii

83
Q

what two vessels come around the sides of the elbow to enter around the cubital fossa

A

basilic (medial) and cephalic (lateral) veins

84
Q

what connects the basilic vein with the cephalic vein

A

the medial cubital vein

85
Q

what vein comes off the medial cubital vein

A

median antebrachial vein

86
Q

what nerve passes close by the cephalic vein

A

lateral cutaneous nerve of forearm (from musculocutaneous nerve)

87
Q

what nerve passes close to the basilic vein

A

ulnar nerve

88
Q

what nerve runs close to the median antebrachial vein and can get damaged if needle is pushed too deep

A

median nerve

89
Q

the brachial artery enters the cubital fossa underneath what structure

A

bicipital aponeurosis

90
Q

what vein types have valves and what does this help

A

deep veins have valves so the pulsatory artery can aid venous return

91
Q

are deep veins or superficial veins bigger

A

superficial veins

92
Q

what vein branches into the axillary vein

A

cephalic vein

93
Q

what are paired veins and what do they often run alongside

A

deep veins that runs with arteries (spirals/twists around arteries)

94
Q

what feeds into the brachial vein

A

basilic vein

95
Q

is the basilic vein a deep vein

A

no

96
Q

is the brachial vein a deep vein

A

yes

97
Q

what side does the basilic vein drain

A

medial

98
Q
A

MED221A/B Lectures (23 decks)

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