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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
what compartment of the arm and forearm does the radial nerve innervate
arm = posterior forearm = lateral and posterior
26
what compartment of the arm and forearm does the ulnar nerve innervate
arm = none forearm = some medial
27
what compartment of the arm and forearm does the median nerve innervate
arm = none forearm = most of medial
28
where is the attachment of the common flexor tendon of the forearm
medial epicondyle
29
where is the attachment of the common extensor tendon of the forearm
lateral epicondyle
30
what is the muscle that inserts about the medial epicondyle
pronator teres
31
what nerve innervates pronator teres
median
32
what nerve innervates the common flexor tendon
mostly median but some ulnar
33
what nerve innervates the common extensor tendon
radial
34
what are the two muscles that insert above the lateral epicondyle
most superior = brachioradialis more inferior of the two = extensor carpi radialis longus (ECRL)
35
what nerve innervates brachioradialis and ECRL
radial
36
what nerves innervate biceps brachii
musculocutaneous nerve
37
what nerves innervate brachialis
musculocutaneous nerve
38
what attaches onto the lateral/medial intermuscular septa
muscles of the forearm
39
what is the action of bicep brachii - 3 things
elboe flexor supinator shoulder flexion
40
what are the origins and insertions of bicep brachii
origin = coracoid (short head) and supraglenoid tubercle (long head) insertion = radial tuberosity and bicipital aponeurosis
41
what innervates coracobrachialis
musculocutaneous nerve
42
what actions does coracobrachialis do - 2 things
adducts shoulder flexes shoulder
43
where is the origin and insertion of coracobrachialis
origin = coracoid insertion = medial side of humerus (opposite deltoid tuberosity)
44
what is the action of brachialis
main elbow flexor
45
what is the origin and insertion of brachialis
origin = anterior surface of distal humerus (including muscular septa) insertion = ulna tuberosity
46
what are shunt muscles
prevent unwanted inferior movement of HOH at shoulder joint during loading
47
what are 4 examples of shunt muscles
deltoid short head brachialis coracobrachialis long head triceps
48
what innervates tricep brachii
radial nerve
49
what is the origin and insertions of tricep brachii
origin = infraglenoid tubercle (long head), mid humerus (medial head), proximal humerus (lateral head) insertion = olecranon
50
what is the muscle that originates form the lateral epicondyle distal to triceps
anconeus
51
what actions does triceps cause - 3 things
elbow extensor shoulder adductor shoulder extensor
52
what muscle does the musculocutaneous nerve dive into in the forearm
coracobrachialis
53
once the musculocutaneous nerve has finished its motor supply what cutaneous nerve does it become
lateral cutaneous nerve of forearm
54
what two nerve only travel on the anterior arm and forearm
musculocutaneous nerve and median nerve
55
what does the median nerve supply in the arm
nothing
56
what is the ulnar nerves path down the arm and forearm
down medial anterior of arm passes under medial intermuscular septum and runs behind medial epicondyle then turns anterior again down the forearm
57
what is the radial nerves path down the arm and forearm
down posterior arm in radial groove turns anterior at the lateral epicondyle and becomes posterior again ?
58
what does the median nerve enter the cubital fossa under
under the bicepetal aponeurosis
59
what are the 3 spaces made up by muscle borders in the posterior shoulder region
quadrangular space triangular space triangular interval
60
how many structures run through the quadrangular space and what are they
2 axillary nerve posterior circumflex humeral artery and vein
61
how many structures run through the triangular space and what are they
1 circumflex scapular artery
62
how many structures run through the triangular interval and what are they
2 profunda brachii artery radial nerve
63
what 3 structures mark the borders of the triangular space
teres major (laterally) lateral scapular border (medially) long head tricep brachii (superiorly)
64
what 3 structures mark the borders of the triangular interval
long head tricep brachii (medially) teres major (superiorly) humerus (laterally)
65
what 4 structures mark the borders of the quadrangular space
humeral head (superiorly) long head tricep brachii (medially) humerus (laterally) teres major (inferiorly)
66
what space does the radial nerve travel through
triangular interval
67
what space does the axillary nerve travel through
quadrangular space
68
what space does the posterior circumflex humeral artery travel through
quadrangular space
69
what space does the circumflex scapular artery travel through
triangular space
70
what space does the profunda brachii artery travel through
triangular interval
71
what two branches come off the axillary artery at its proximal end
ant and post humeral circumflex arteries
72
what does the axillary artery become more distally
brachial artery
73
what is the profunda brachii artery in terms of where in branches from and where it runs in the arm
branch off axillary artery runs posterior to humerus
74
what are the 2 main branches the brachial artery becomes
ulnar (medial) and radial (lateral) arteries
75
what does the profunda brachii artery supply
everything in back of arm
76
what do recurrent vessels allow
flow against conventional current flow - goes from distal to proximal = allows alternative flow around the periphery anastomoses with collateral vessels
77
what do the collateral arteries anastomose with
reccurent arteries
78
what makes up the superior border of the cubital fossa
imaginary line between lateral and medial epicondyles
79
what makes up the medial border of the cubital fossa
pronator terres
80
what makes up the lateral border of the cubital fossa
bracioradialis
81
what makes up the floor of the cubital fossa
brachialis
82
what makes up the roof of the cubital fossa
bicep brachii
83
what two vessels come around the sides of the elbow to enter around the cubital fossa
basilic (medial) and cephalic (lateral) veins
84
what connects the basilic vein with the cephalic vein
the medial cubital vein
85
what vein comes off the medial cubital vein
median antebrachial vein
86
what nerve passes close by the cephalic vein
lateral cutaneous nerve of forearm (from musculocutaneous nerve)
87
what nerve passes close to the basilic vein
ulnar nerve
88
what nerve runs close to the median antebrachial vein and can get damaged if needle is pushed too deep
median nerve
89
the brachial artery enters the cubital fossa underneath what structure
bicipital aponeurosis
90
what vein types have valves and what does this help
deep veins have valves so the pulsatory artery can aid venous return
91
are deep veins or superficial veins bigger
superficial veins
92
what vein branches into the axillary vein
cephalic vein
93
what are paired veins and what do they often run alongside
deep veins that runs with arteries (spirals/twists around arteries)
94
what feeds into the brachial vein
basilic vein
95
is the basilic vein a deep vein
no
96
is the brachial vein a deep vein
yes
97
what side does the basilic vein drain
medial
98

MED221A/B Lectures (23 decks)

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