Axilla and Brachial Plexus Flashcards Preview

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Flashcards in Axilla and Brachial Plexus Deck (59)
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1
Q

What muscles make up the anterior wall of the axilla?

A

Pectoralis major and minor mm.

2
Q

What muscles make up the posterior wall of the axilla?

A

Latissimus dorsi, teres major, and subscapularis mm.

3
Q

What makes up the medial wall of the axilla?

A

Serratus anterior m.

4
Q

What makes up the lateral wall of the axilla?

A

Intertubercular sulcus of humerus

5
Q

What makes up the base of the axilla?

A

Skin and fascia of armpit

6
Q

Generally what and where is the axilla?

A

Pyramidal shaped region between the arm and chest

7
Q

What are the contents of the axilla?

A

Fat and connective tissue; Axillary veins and lymphatics (outside sheath); cutaneous nerves; and axillary sheath-axillary artery and brachial plexus

8
Q

What are the five principal groups of lymph nodes in the axilla?

A

Pectoral, subscapular, humeral, central, and apical

9
Q

Pectoral lymph nodes drain what?

A

Anterior thoracic wall and most of breast

10
Q

Subscapular lymph nodes drain what?

A

Posterior thoracic wall and scapular region

11
Q

Humeral lymph nodes drain what?

A

Upper left except for the portion along the cephalic vein

12
Q

Central lymph nodes of the axilla drain what?

A

Pectoral, humeral, and central lymph nodes

13
Q

Apical lymph nodes of the axilla drain what?

A

All other lymph nodes of the axilla and proximal cephalic vein nodes

14
Q

Part one of the axillary artery is located where?

A

Between the first rib and pectoralis minor muscle

15
Q

Part two of the axillary artery is located where?

A

Deep to pectoralis minor muscle

16
Q

Part three of the axillary artery is located where?

A

Between pectoralis minor muscle and teres major muscle

17
Q

What artery comes off the first branch of the axillary artery?

A

Superior thoracic artery

18
Q

What arteries come off the second branch of the axillary artery?

A

Thoracoacromial and lateral thoracic aa.

19
Q

What arteries come off the third branch of the axillary artery?

A

Subscapular anterior, subscapular posterior, and circumflex humeral

20
Q

The brachial plexus is composed of what ventral rami?

A

C5-T1

21
Q

The brachial plexus provides nerves for what?

A

All upper limb muscles except trapezius muscle (CN XI)

22
Q

What is the structure of the brachial plexus?

A

Rami(5), Trunks(3), Divisions(6), Cords(3), Branches(5)

23
Q

The musculocutaneous nerve contains what spinal nerves?

A

C5-C7

24
Q

The medial nerve contains what spinal nerves?

A

C5-T1

25
Q

Axillary nerve contains what spinal nerves?

A

C5 and C6

26
Q

The radial nerve contains what spinal nerves?

A

C5-T1

27
Q

the ulnar nerve contains what spinal nerves?

A

C8 and T1

28
Q

The musculocutaneous nerve is formed from what?

A

Lateral cord of brachial plexus

29
Q

The musculocutaneous nerve passes through what muscle?

A

Coracobrachialis muscle

30
Q

What is the major nerve of the anterior arm?

A

Musculocutaneous nerve

31
Q

The musculocutaneous nerve innervates what?

A

Coracobrachialis muscle, biceps, and half of 1/2 of brachialis muscle

32
Q

The median nerve is formed from what?

A

1/2 of medial cord and 1/2 of lateral cord of the brachial plexus

33
Q

What is the major nerve of the anterior forearm?

A

The median nerve

34
Q

The median nerve innervates what?

A

Innervates most of the anterior forearm and muscles of the hand

35
Q

What is the major nerve of the hand?

A

Ulnar nerve

36
Q

The ulnar nerve is formed from what?

A

Medial cord

37
Q

The ulnar nerve runs behind what making it susceptible to “bumping” and making the funny bone feeling?

A

Runs behind medial epicondyle

38
Q

The ulnar nerve innervates what?

A

Most of the muscles of the hand, flexor carpi ulnaris muscles, and 1/2 of flexor digitorum profundus muscles

39
Q

The axillary nerve is formed from what?

A

Formed from posterior cord

40
Q

The axillary nerve circles behind the humerus in what space?

A

Quadrangular space

41
Q

The axillary nerve innervates what?

A

Innervates deltoid and terres minor muscles

42
Q

The radial nerve is formed from what?

A

Posterior cord

43
Q

The radial nerve passes posterior to humerus in (1)_____ ______ and within (2)______ ______.

A

1) Radial groove

2) Triangular interval

44
Q

What is the major nerve of the posterior arm and forearm?

A

Radial nerve

45
Q

The radial nerve innervates what?

A

Innervates all muscles in posterior arm and forearm, and 1/2 of brachialis muscle

46
Q

What are the three upper plexus nerves?

A

Dorsal scapular nerve (C5), Long thoracic nerve (C5-C7), and Suprascapular nerve (C5-C6)

47
Q

The dorsal scapular nerve innervates what?

A

Rhomboid and levator scapulae muscles

48
Q

The long thoracic nerve innervates what?

A

Serratus anterior muscle

49
Q

The suprascapular nerve innervates what?

A

Supraspinatus and infraspinatus muscles

50
Q

What are the two pectoral nerves?

A

Lateral pectoral and medial pectoral nerves

51
Q

The lateral pectoral nerve innervates what?

A

Pectoralis major muscle

52
Q

The medial pectoral nerves innervate what?

A

Pectoralis major and minor muscles

53
Q

What are the three lower plexus nerves?

A

Upper subscapular, thoracodorsal, and lower subscapular nn.

54
Q

The upper subscapular nerve innervates what?

A

Subscapularis muscle

55
Q

The thoracodorsal nerve innervates what?

A

Latissimus dorsi muscle

56
Q

The lower subscapular nerve innervates what?

A

Subscapularis and teres major muscle

57
Q

What are the three additional nerves of the brachial plexus?

A

Nerve to subsclavius m (C5-C6), medial cutaneous nerve (C8-T1), medial antibrachial cutaneous nerve (C8-T1)

58
Q

The medial cutaneous nerve innervates what?

A

Sensory to medial nerve

59
Q

The medial antibrachial cutaneous nerve innervates what?

A

Sensory to medial forearm