Brachial Plexus Flashcards

1
Q

What type of innervation does the brachial plexus supply

A

motor sensory and sympathetic

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2
Q

what type of nerves make up brachial plexus

A

ventral rami of spinal nerves C5-T1

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3
Q

What are the names for the structural components of the brachial plexus

A

Rami(roots), Trunks, Divisions, Cords, Branches

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4
Q

What are the roots that supply brachial plexus

A

C5-T1 as exit respective intervertebral foramina in neck and upper thorax

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5
Q

What are the trunks of the brachial plexus

A

Upper Middle and Lower

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6
Q

What makes the upper trunk

A

C5 and C6

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7
Q

What makes the middle trunk

A

continuation of C7

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8
Q

What makes the lower trunk

A

C8 and T1

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9
Q

What do the anterior divisions of the brachial plexus contribute to

A

lateral and medial cords

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10
Q

what do the posterior divisions of the brachial plexus contribute to

A

extensions of all three trunks. forms posterior cord

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11
Q

What is the first portion of brachial plexus in the axilla region

A

the cords

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12
Q

What are the cords named for

A

relation to the axillary artery

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13
Q

What forms the lateral cord

A

union of 2 anterior divisions from upper trunk and from middle trunk C567

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14
Q

What forms the medial cord

A

direct continuation of the anterior portion of the lower trunkC8T1

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15
Q

What forms the posterior cord

A

union of 3 posterior divisions. all spinal nerve roots participate. C5-T1

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16
Q

What branches come off lateral cord

A

lateral pectoral nerve
contributary to median nerve
musculocutaneous nerve

17
Q

What levels does musculocutaneus nerve contain

A

C567

18
Q

What branches come off medial cord

A
medial pectoral n
medial brachial cutaneous nerve
medial antebrachial cutaneous nerve
contributary to median nerve
ulnar nerve
19
Q

What spinal nerves supply ulnar nerve

A

C8T1

20
Q

What branches off posterior cord

A

upper subscapular nerve, thoracodorsal nerve, lower sub scapular nerve, axillary nerve, radial nerve

21
Q

what innervates subscapularis

A

upper subscapular nerve

22
Q

what innervates lat dorsi

A

thoracodorsal nerve, known also as middle subscapular nerve

23
Q

what innervates subscapularis and trees major

A

lower subscapular nerve

24
Q

What does axillary nerve innervate. what cord levels does in contain

A

deltoid and teres minor C5 C6

25
Q

What are the two terminal branches of posterior cord

A

axillary nerve and radial nerve

26
Q

What does the radial n innervate

A

all muscles of the dorsal surface of the upper limb

27
Q

what does the median nerve innervate and what cord levels does it contain

A

central antebrachial mm and thenar m of hand. C5 inconsistently and C6-T1

28
Q

What are the terminal branches of brachial plexus

A
Musculocutaneous
Ulnar
Axillary
Radial
Median
29
Q

What are the supraclavicular branches from brachial plexusq

A

dorsal scap
suprascap
nerve to subclavius
long thoracic nerve

30
Q

What levels does suprascap n have

A

C5 and C6

31
Q

What levels does nerve to subclavius contain

A

C5 and C6

32
Q

What ventral rami are contained in long thoracic nerve

A

C5 C6 C7

33
Q

T/F each ventral rams that participates in formation of brachial plexus receives gray rami communicans

A

true

34
Q

What is the dermatomal innervation of upper limb

A

C4-T3

35
Q

What innervates the dermatomes of shoulder

A

C4 from cervical plexus

36
Q

What innervates the anterior medial and posteromedial portion of upper arm

A

intercostobrachial cutaneous nerves T1 T2 and sometimes T3