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Winter Anatomy Quiz 3 > Axilla/Brachial Plexus > Flashcards

Axilla/Brachial Plexus Flashcards

1
Q

What MUST be reflected in order to access the Axilla?

A

Pec major

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2
Q

What 4 structures are part of the posterior border of the Axilla?

A

Lat dorsi
Teres major
Long head of triceps
Subscapularis

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3
Q

What 2 structures form the medial border of the Axilla?

A

Lateral thoracic wall

Serratus anterior

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4
Q

What forms the lateral border of the Axilla?

A

Intertubercular groove of humerus

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5
Q

What 2 structures form the apex of the Axilla?

A

Clavicle

First rib

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6
Q

What 4 structures pass through the Axilla?

A

Axillary artery
Brachial plexus
Axillary vein
Lymphatics

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7
Q

What is contained within the Axillary sheath?

A

Axillary artery
Brachial plexus
Axillary vein

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8
Q

The Axillary sheath is an extension of what?

A

Pre vertebral fascia

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9
Q

Where is the injection site for an anesthetic block for the brachial plexus?

A

Axillary sheath

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10
Q

The Lymphatics in the axilla drain what 3 general regions?

A

Upper extremity
Breast
Upper abdominal wall

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11
Q

Go over artery tree!!!

A

Know branches of Axillary artery

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12
Q

The Axillary artery is divided into how many parts?

A

3

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13
Q

How many branches does the 1st part of the Axillary artery have? They are?

A

1- superior thoracic

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14
Q

How many branches does the 2nd part of the Axillary artery have? They are?

A

2- thoracoacromial, lateral thoracic

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15
Q

How many branches does the 3rd part of the Axillary artery have? They are?

A

3- Subscapular, anterior circumflex humeral, posterior circumflex humeral

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16
Q

The Subscapular artery has how many divisions? They are?

A

2- thoracodorsal, circumflex scapular

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17
Q

The subclavian passes ____________ to the first rib.

A

Superior

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18
Q

What is the orientation of the subclavian to the anterior and middle scalenes?

A

Posterior to anterior

Anterior to middle

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19
Q

The Axillary artery travels _________ to the 1st rib.

A

Lateral

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20
Q

Which is more superficial, the Axillary artery or vein?

A

Vein

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21
Q

Explain the relationship of the parts of the Axillary artery to the pectoralis minor.

A

1st part- proximal
2nd part- posterior
3rd part- distal

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22
Q

The brachial artery lies at the ___________ border of what muscle?

A

Inferior, teres major

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23
Q

Which 2 veins drain into the Axillary vein?

A

Brachial and basilic

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24
Q

The Axillary vein lies ____________ to the Axillary artery.

A

Anteromedial

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25
Q

The ___________ vein drains into the Axillary vein where?

A

Cephalic

Lateral to 1st rib

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26
Q

The subclavian vein lies where?

A

Lateral border of 1st rib

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27
Q

The brachial plexus is made of ________ of which roots?

A

Ventral rami

C5-T1

28
Q

True or False. The brachial plexus provides ALL the innervation to the arm.

A

True

29
Q

How many roots to the brachial plexus are there? They are?

A

5- C5, C6, C7, C8, T1

30
Q

How many trunks are in the brachial plexus? They are?

A

3- superior, middle, inferior

31
Q

How many divisions of the brachial plexus are there? They are?

A

6- 3 anterior and 3 posterior

32
Q

How many cords are in the brachial plexus? They are?

A

3- lateral, posterior, medial

33
Q

How many branches are in the brachial plexus? They are?

A

5- musculocutaneous, Axillary, radial, median, ulnar

34
Q

Which 2 nerves branch from the C5 root?

A

Dorsal scapular

Phrenic

35
Q

Which 2 nerves branch from the superior trunk?

A

Suprascapular

Subclavius

36
Q

Which roots does the musculocutaneous come from?

A

C5
C6
C7

37
Q

Which roots does the Axillary nerve come from?

A

C5

C6

38
Q

Which roots does the radial nerve come from?

A

C5-T1

39
Q

Which roots does the median nerve come from?

A

C5-T1

40
Q

Which roots does the ulnar nerve come from?

A

C7
C8
T1

41
Q

What does the musculocutaneous nerve innervate?

A

3 muscles of anterior arm

42
Q

What 2 muscles does the Axillary nerve innervate?

A

Deltoid

Teres minor

43
Q

What 3 regions does the radial nerve innervate?

A

Posterior arm
Posterior forearm
Hand (indirectly)

44
Q

What 2 regions does the median nerve innervate?

A

Anterior forearm

Hand

45
Q

What 2 regions does the ulnar nerve innervate?

A

1.5 anterior forearm

Hand

46
Q

How many branches are there off the lateral cord? They are?

A

3- lateral pectoral, musculocutaneous, lateral root of median

47
Q

How many branches are there from the medial cord? They are?

A

5- medial pectoral, medial brachial cutaneous, medial ante brachial cutaneous, ulnar, medial root of median

48
Q

How many branches are there off the posterior cord? They are?

A

5- upper Subscapular, thoracodorsal, lower Subscapular, radial, Axillary

49
Q

Which 4 nerves LEAVE the brachial plexus before the divisions?

A

Long thoracic
Dorsal scapular
Supra scapular
Subclavius

50
Q

What innervates the serratus anterior?

A

Long thoracic

51
Q

What innervates the rhomboids and levator scapulae?

A

Dorsal scapular

52
Q

What innervates the supraspinatus? Infraspinatus?

A

Supra scapular

53
Q

What innervates ONLY the pec major?

A

Lateral pectoral

54
Q

What innervates BOTH the pec major and pec minor?

A

Medial pectoral

55
Q

Which dermatome marks the thumb?

A

C6

56
Q

Which dermatome marks the 2nd and 3rd fingers?

A

C7

57
Q

Which dermatome marks the 4th and 5th fingers?

A

C8

58
Q

Most of the Lymphatics drain to the thoracic duct except which 3 regions? Where do they drain?

A

Right head
Right thorax
Right upper extremity
Right lymphatic duct

59
Q

What is the anterior border of the Axilla?

A

Pec major and minor

60
Q

What innervates all 3 anterior muscles of the arm?

A

Musculocutaneous

61
Q

What innervates the 1 muscle in the posterior arm?

A

Radial

62
Q

Which 2 nerves do NOT innervate anything in the arm?

A

Median

Ulnar

63
Q

Which nerve innervates NO intrinsic muscles of the hand?

A

Radial

64
Q

Which nerve innervates ALL the extensor muscles of the elbow and wrist and MP joints?

A

Radial

65
Q

Which nerve innervates the brachioradialis muscle?

A

Radial

66
Q

All muscles in the flexor/anterior compartment of the forearm EXCEPT 1.5 muscles are innervated by what?

A

Median

67
Q

Which 1.5 muscles are innervated by the ulnar nerve?

A

Flexor carps ulnaris

Ulnar/medial half of flexor digitorum profundus

Winter Anatomy Quiz 3 (3 decks)

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