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Anatomy > Brachial Plexus, Peripheral Nerves, Arm > Flashcards

Brachial Plexus, Peripheral Nerves, Arm Flashcards

1
Q

what are the spinal Roots/spinal nerves of the brachial plexus

A

C5, c6, c7, c8, t1

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2
Q

what are the spinal roots/spinal nerves of the phrenic nerve

A

c3, c4, c5 keep the diaphragm alive

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3
Q

what are the 3 trunks of the brachial plexus

A

superior, middle, inferior

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4
Q

how many anterior divisions are in the brachial plexus

A

3

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5
Q

how many posterior divisions are in the brachial plexus

A

3

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6
Q

what are the cords of the brachial plexus

A

lateral, posterior, medial

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7
Q

what are the branches of the brachial plexus

A

musculocutaneous, median, ulnar, radial, axillary

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8
Q

how many trunks are there in the brachial plexus

A

3

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9
Q

how many roots are there in the brachial plexus

A

5

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10
Q

what roots form the superior trunk

A

C5 and C6

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11
Q

what root forms the middle trunk

A

C7

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12
Q

what roots form the inferior trunk

A

C8 and T1

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13
Q

what muscle does the long thoracic nerve innervate*

A

serratus anterior

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14
Q

what muscle does the dorsal scapular nerve innervate

A

levator scapulae and rhomboids

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15
Q

the LATERAL cord is formed from the ________ division from the _______ and _______ trunks

A

Formed from the anterior division from the superior and middle trunks

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16
Q

the POSTERIOR cord is formed from the __________ divisions from all 3 trunks

A

Formed from the posterior divisions from all 3 trunks

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17
Q

the MEDIAL cord is formed from the ________ division of the ________ trunk

A

Medial cord is formed from the anterior division of the inferior trunk

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18
Q

what 3 things does the lateral cord give off?

A

Lateral pectoral
Musculocutaneous
½ Median nerve

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19
Q

what spinal roots are the medial cord

A

C8, T1

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20
Q

what spinal roots are the lateral cord

A

C5, C6, C7

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21
Q

what spinal roots are the posterior cord

A

ALL 5 NERVE ROOTS

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22
Q

what 3 muscles does the musculocutaneous nerve branch innervate

A

biceps brachii
brachialis
coracobrachialis

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23
Q

after innervating the biceps brachii, brachialis, and coracobrachialis; does the musculocutaneious nerve become a purely sensory nerve?

A

YES

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24
Q

what nerve supplies most of the small muscles of the hand, wrist flexor

A

ulnar nerve

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25
Q

what does antibrachial mean?

A

forearm

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26
Q

what does brachial mean?

A

arm (upper arm)

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27
Q

what 3 nerves go to the hand

A

radial, ulnar, median

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28
Q

what nerve supplies the thumb

A

radial

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29
Q

what nerve is wrist drop (with NORMAL sensation)

A

posterior interocious nerve (PIN)

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30
Q

what 5 things does the medial cord give off?

A

½ Median nerve
Medial pectoral nerve
Medial brachial cutaneous nerve
Medial antebrachial cutaneous nerve
Ulnar nerve

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31
Q

what does the median nerve innervate

A

muscles in forearm and hand

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32
Q

what does the medial pectoral nerve innervate

A

pectoralis minor and major

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33
Q

what does the medial brachial cutaneous nerve innervate

A

skin of medial arm

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34
Q

what does the medial antebrachial cutaneous nerve innervate

A

skin of medial FOREarm

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35
Q

what does the ulnar nerve innervate

A

muscles of forearm and hand

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36
Q

what 5 things does the posterior cord give off?

A

axillary nerve
radial nerve
thoracodorsal nerve
upper subscapular nerve
lower subscapular nerve

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37
Q

what does the axillary nerve innervate

A

deltoid
teres minor
(lateral shoulder*)
(can be stretched when a person dislocates their shoulder)

38
Q

what does the radial nerve innervate (BIGGEST NERVE)

A

triceps
ancouneus
brachioradialis
extensor muscles of the forearm

39
Q

what wraps around the medial epicondyle

A

ulnar nerve

40
Q

what does the thoracodorsal innervate

A

latissimus dorsi

41
Q

what 3 nerves create the classic M

A

musculocutaneous nerve, median nerve, ulnar nerve

42
Q

what cord does the musculocutaneous nerve originate from

A

lateral cord

43
Q

what cord does the median nerve originate from

A

lateral and medial cords

44
Q

what cord does the ulnar nerve originate from

A

medial cord

45
Q

what nerve passes through the quandragular space

A

axillary nerve

46
Q

what forms the common triceps tendon

A

lateral, long, medial triceps

47
Q

what kind of nerve can be hurt by a humerus fracture

A

radial nerve

48
Q

what nerve innervates most of the palm of the hand (thumb, index, middle finger, half of ring finger, and palm)

A

median nerve

49
Q

what nerve is damaged by carpal tunnel

A

median

50
Q

what innervates most of the back (dorsal) of the hand

A

radial

51
Q

what innervates half of the ring finger and pinky

A

ulnar

52
Q

what innevates the lateral sensation (near the thumb side) forearm

A

musculocutaneous nerve

53
Q

what flexes the elbow

A

musculocutaneous nerve

54
Q

what nerve innervates the coracobrachialis, biceps brachii, brachialis

A

musculocutaneous

55
Q

what cord does the radial nerve come from

A

posterior cord

56
Q

what nerve innervates the triceps, wrist extensor, digit extension

A

radial nerve

57
Q

what muscle helps supinate and pronate

A

brachialradialis

58
Q

what is the main muscle supinator

A

biceps

59
Q

is the superficial radial sensory?

A

yes, purely sensory

60
Q

what comes from the DEEP radial nerve and changes its name? is this motor?

A

posterior interocious nerve (PIN)

yes it is motor

61
Q

if there is NO sensation and the wrist cannot be moved, what nerve is this

A

radial nerve

62
Q

what innervates the brachialis

A

median nerve

63
Q

what 2 nerves do NOT have any branches to the arm or axilla*

A

median and ulnar nerve

64
Q

what is an area of skin that is supplied by 1 (one) spinal SENSORY nerve

A

dermatome

65
Q

what is C6 dermatome

A

thumb

66
Q

what is C7 dermatome

A

middle finger

67
Q

what is C8 dermatome

A

little (pinky nerve)

68
Q

what is C5 dermatome

A

anterolateral shoulder

69
Q

what is dense connective tissue that covers the bone

A

periostium (this is rough)

70
Q

what covers the joints of bones

A

articular cartilage (this is smooth)

71
Q

what is between the radius and ulnar, fibrous connective tissue that holds them together

A

interosseous membrane

72
Q

what tuberosity helps with supination?

A

bicipital tuberosity

73
Q

does fascia/connective tissue stretch/grow slowly?

A

yes

74
Q

can you still have a radial pulse with compartment syndrome in the forearm

A

yes

75
Q

are there anterior and posterior compartments in the arm

A

yes

FOREarm is more common for compartment syndrome

76
Q

what muscle has an origin in the coracoid process of scapula

A

coracobrachialis

77
Q

what muscle has the action of FLEXING arm at shoulder and ADDUCTS arm at shoulder

A

coracobrachialis

78
Q

what muscle has the action of FLEXING forearm at elbow and supinating forearm

A

biceps brachii

79
Q

what has origin at supraglenoid tubercle of glenoid

A

long head of biceps brachii

80
Q

what has origin at the coracoid fossa

A

short head of the biceps brachii

81
Q

what flexes forearm at the elbow (only action it performs!)

A

brachialis

82
Q

what has origin at the distal half of anterior humerus

A

brachialis

83
Q

what has insertion at the cornoid process of ulna

A

brachialis

84
Q

what innervates the triceps

A

radial nerve

85
Q

what is the deep head of the triceps

A

medial head

86
Q

what muscle extends forearm at elbow; weak shoulder extensor (long head only)

A

triceps brachii

87
Q

what muscle group inserts on the olecranon of the ulna

A

triceps brachii

88
Q

what tiny muscle stabilizes the shoulder joint, extends elbow

A

anconeus

radial nerve innervates this

89
Q

what are the muscles that create the UPPER triangular space

A

teres minor
teres major
long head triceps

90
Q

what are the muscles that create the LOWER triangular space

A

teres major
lateral head of triceps
long head triceps

(radial nerve is here)

91
Q

what are the muscles of the quandrangular space

A

subscapularis
teres minor
teres major
long head triceps
humerus

axillary nerve

Anatomy (8 decks)

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