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Anatomy HK 3401 > Brachial Plexus > Flashcards

Brachial Plexus Flashcards

1
Q

What is a plexus?

A

network of interjoining nerves/ vessels

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2
Q

What are the first 3 dissection steps to see BP?

A
  1. reflect pectoralis major
  2. reflect pectoralis minor
  3. remove axillary vein/ tributaries
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3
Q

Where is access to the axillary brachial plexus?

A

deep to anterior wall of axilla

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4
Q

What is the orientation landmark of the brachial plexus?

A

pectoralis minor inserting on coracoid process

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5
Q

What is the brachial plexus formed from?

A

anterior rami of spinal nerves C5/C6/C7/C8/T1

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6
Q

Why is there a C8 spinal nerve?

A

spinal nerves- above vertebrae

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7
Q

What form the roots of the brachial plexus?

A

anterior rami of spinal nerves C5-T1

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8
Q

What provides innervation to muscles of the upper limb?

A

brachial plexus

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9
Q

Starting from the spinal cord what are the components of the brachial plexus? (5x)

A

roots
trunks
divisions
cords
branches

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10
Q

What is the menomic for the 5 parts of the brachial plexus?

A

Beer Cold Drink To Remember
branches/ cords/ divisions/ trunks/ roots

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11
Q

What part of the brachial plexus does the clavicle pass through?

A

divisions

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12
Q

What are the cords of the brachial plexus deep to?

A

insertion of pectoralis minor

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13
Q

How many trunks are there?

A

3

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14
Q

What are the 3 trunks called?

A

upper/ middle/ lower

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15
Q

How many divisions are there?

A

6x- anterior/ posterior (from each trunk)

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16
Q

How many cords are there?

A

3

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17
Q

What are the 3 cords called- in order superior to inferior?

A

lateral/ posterior/ medial

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18
Q

What nerves arise from roots/ trunks in the supraclavicular region of the BP? (leave early)

A

dorsal scapular nerve
long thoracic nerve
suprascapular nerve
nerve to subclavius

19
Q

What muscles are associated with dorsal scapular nerve?HINT: muscles associated with medial border of scapula

A

levator scapulae
rhomboid major
rhomboid minor

20
Q

What muscle is associated with long thoracic nerve?

A

serratus anterior

21
Q

What muscles are associated with suprascapular nerve?

A

suprasoinatus
infraspinatus

22
Q

What muscle is associated with nerve to subclavius?

A

subclavius

23
Q

What are the 2 branches from roots?

A

Dorsal scapular nerve C5
Long thoracic nerve C5-C7

24
Q

What are the 2 branches from trunks?

A

Suprascapular nerve C5/C6
Nerve to subclavius C5/C6

25
Q

What are the arteries that give blood supply to upper limb?
- in order superior to inferior

A

subclavian/ axillary/ brachial

26
Q

How are the cords of the brachial plexus named?

A

in relation to axillary artery
posterior/ lateral/ medial

27
Q

Where does pectoralis minor insert?

A

coracoid process of scapula

28
Q

What branch arises from the lateral cord?

A

Musculocutaneous nerve

29
Q

What branch arises from medial cord?

A

Ulnar nerve

30
Q

What branch arises from medial/ lateral cords?

A

Median nerve

31
Q

What branches arise from the cords?
superior to inferior

A

Musculocutaneous nerve
Median nerve
Ulnar nerve

32
Q

What branches arise from the posterior cord?

A

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

33
Q

Where is the posterior cord in relation to pectoralis minor?

A

deep

34
Q

How many branches arise from the posterior cord?

A

5

35
Q

What muscles are associated with axillary nerve?

A

deltoid
teres minor

36
Q

What muscles are associated with radial nerve?

A

extensors of the upper limb

37
Q

What muscle is associated with thoracodorsal nerve?

A

latissimus dorsi

38
Q

What muscle is associated with upper subscapular nerve?

A

subscapularis

39
Q

What muscles are associated with lower subscapular nerve?

A

subscapularis
teres major

40
Q

What does the axillary nerve innervate?

A

deltoid
teres minor

41
Q

What muscles are associated with lateral root of median nerve?

A

anterior forearm
hand

42
Q

What muscles are associated with musculocutaneous nerve?

A

biceps brachii
brachialis
coracobrachiales

43
Q

What muscles are associated with lateral pectoral nerve?

A

pectoralis major
pectoralis minor

Anatomy HK 3401 (7 decks)

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