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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
what does antibrachial mean?
forearm
26
what does brachial mean?
arm (upper arm)
27
what 3 nerves go to the hand
radial, ulnar, median
28
what nerve supplies the thumb
radial
29
what nerve is wrist drop (with NORMAL sensation)
posterior interocious nerve (PIN)
30
what 5 things does the medial cord give off?
½ Median nerve Medial pectoral nerve Medial brachial cutaneous nerve Medial antebrachial cutaneous nerve Ulnar nerve
31
what does the median nerve innervate
muscles in forearm and hand
32
what does the medial pectoral nerve innervate
pectoralis minor and major
33
what does the medial brachial cutaneous nerve innervate
skin of medial arm
34
what does the medial antebrachial cutaneous nerve innervate
skin of medial FOREarm
35
what does the ulnar nerve innervate
muscles of forearm and hand
36
what 5 things does the posterior cord give off?
axillary nerve radial nerve thoracodorsal nerve upper subscapular nerve lower subscapular nerve
37
what does the axillary nerve innervate
deltoid teres minor (lateral shoulder*) (can be stretched when a person dislocates their shoulder)
38
what does the radial nerve innervate (BIGGEST NERVE)
triceps ancouneus brachioradialis extensor muscles of the forearm
39
what wraps around the medial epicondyle
ulnar nerve
40
what does the thoracodorsal innervate
latissimus dorsi
41
what 3 nerves create the classic M
musculocutaneous nerve, median nerve, ulnar nerve
42
what cord does the musculocutaneous nerve originate from
lateral cord
43
what cord does the median nerve originate from
lateral and medial cords
44
what cord does the ulnar nerve originate from
medial cord
45
what nerve passes through the quandragular space
axillary nerve
46
what forms the common triceps tendon
lateral, long, medial triceps
47
what kind of nerve can be hurt by a humerus fracture
radial nerve
48
what nerve innervates most of the palm of the hand (thumb, index, middle finger, half of ring finger, and palm)
median nerve
49
what nerve is damaged by carpal tunnel
median
50
what innervates most of the back (dorsal) of the hand
radial
51
what innervates half of the ring finger and pinky
ulnar
52
what innevates the lateral sensation (near the thumb side) forearm
musculocutaneous nerve
53
what flexes the elbow
musculocutaneous nerve
54
what nerve innervates the coracobrachialis, biceps brachii, brachialis
musculocutaneous
55
what cord does the radial nerve come from
posterior cord
56
what nerve innervates the triceps, wrist extensor, digit extension
radial nerve
57
what muscle helps supinate and pronate
brachialradialis
58
what is the main muscle supinator
biceps
59
is the superficial radial sensory?
yes, purely sensory
60
what comes from the DEEP radial nerve and changes its name? is this motor?
posterior interocious nerve (PIN) yes it is motor
61
if there is NO sensation and the wrist cannot be moved, what nerve is this
radial nerve
62
what innervates the brachialis
median nerve
63
what 2 nerves do NOT have any branches to the arm or axilla*
median and ulnar nerve
64
what is an area of skin that is supplied by 1 (one) spinal SENSORY nerve
dermatome
65
what is C6 dermatome
thumb
66
what is C7 dermatome
middle finger
67
what is C8 dermatome
little (pinky nerve)
68
what is C5 dermatome
anterolateral shoulder
69
what is dense connective tissue that covers the bone
periostium (this is rough)
70
what covers the joints of bones
articular cartilage (this is smooth)
71
what is between the radius and ulnar, fibrous connective tissue that holds them together
interosseous membrane
72
what tuberosity helps with supination?
bicipital tuberosity
73
does fascia/connective tissue stretch/grow slowly?
yes
74
can you still have a radial pulse with compartment syndrome in the forearm
yes
75
are there anterior and posterior compartments in the arm
yes FOREarm is more common for compartment syndrome
76
what muscle has an origin in the coracoid process of scapula
coracobrachialis
77
what muscle has the action of FLEXING arm at shoulder and ADDUCTS arm at shoulder
coracobrachialis
78
what muscle has the action of FLEXING forearm at elbow and supinating forearm
biceps brachii
79
what has origin at supraglenoid tubercle of glenoid
long head of biceps brachii
80
what has origin at the coracoid fossa
short head of the biceps brachii
81
what flexes forearm at the elbow (only action it performs!)
brachialis
82
what has origin at the distal half of anterior humerus
brachialis
83
what has insertion at the cornoid process of ulna
brachialis
84
what innervates the triceps
radial nerve
85
what is the deep head of the triceps
medial head
86
what muscle extends forearm at elbow; weak shoulder extensor (long head only)
triceps brachii
87
what muscle group inserts on the olecranon of the ulna
triceps brachii
88
what tiny muscle stabilizes the shoulder joint, extends elbow
anconeus radial nerve innervates this
89
what are the muscles that create the UPPER triangular space
teres minor teres major long head triceps
90
what are the muscles that create the LOWER triangular space
teres major lateral head of triceps long head triceps (radial nerve is here)
91
what are the muscles of the quandrangular space
subscapularis teres minor teres major long head triceps humerus axillary nerve

Anatomy (8 decks)

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