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Anatomy Test Three Material > Axilla and Brachial Plexus > Flashcards

Axilla and Brachial Plexus Flashcards

1
Q

What muscles make up the anterior wall of the axilla?

A

Pectoralis major and minor mm.

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2
Q

What muscles make up the posterior wall of the axilla?

A

Latissimus dorsi, teres major, and subscapularis mm.

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3
Q

What makes up the medial wall of the axilla?

A

Serratus anterior m.

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4
Q

What makes up the lateral wall of the axilla?

A

Intertubercular sulcus of humerus

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5
Q

What makes up the base of the axilla?

A

Skin and fascia of armpit

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6
Q

Generally what and where is the axilla?

A

Pyramidal shaped region between the arm and chest

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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

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8
Q

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

A

Pectoral, subscapular, humeral, central, and apical

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9
Q

Pectoral lymph nodes drain what?

A

Anterior thoracic wall and most of breast

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10
Q

Subscapular lymph nodes drain what?

A

Posterior thoracic wall and scapular region

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11
Q

Humeral lymph nodes drain what?

A

Upper left except for the portion along the cephalic vein

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12
Q

Central lymph nodes of the axilla drain what?

A

Pectoral, humeral, and central lymph nodes

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13
Q

Apical lymph nodes of the axilla drain what?

A

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

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14
Q

Part one of the axillary artery is located where?

A

Between the first rib and pectoralis minor muscle

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15
Q

Part two of the axillary artery is located where?

A

Deep to pectoralis minor muscle

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16
Q

Part three of the axillary artery is located where?

A

Between pectoralis minor muscle and teres major muscle

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17
Q

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

A

Superior thoracic artery

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18
Q

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

A

Thoracoacromial and lateral thoracic aa.

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19
Q

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

A

Subscapular anterior, subscapular posterior, and circumflex humeral

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20
Q

The brachial plexus is composed of what ventral rami?

A

C5-T1

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21
Q

The brachial plexus provides nerves for what?

A

All upper limb muscles except trapezius muscle (CN XI)

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22
Q

What is the structure of the brachial plexus?

A

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

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23
Q

The musculocutaneous nerve contains what spinal nerves?

A

C5-C7

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24
Q

The medial nerve contains what spinal nerves?

25
Axillary nerve contains what spinal nerves?
C5 and C6
26
The radial nerve contains what spinal nerves?
C5-T1
27
the ulnar nerve contains what spinal nerves?
C8 and T1
28
The musculocutaneous nerve is formed from what?
Lateral cord of brachial plexus
29
The musculocutaneous nerve passes through what muscle?
Coracobrachialis muscle
30
What is the major nerve of the anterior arm?
Musculocutaneous nerve
31
The musculocutaneous nerve innervates what?
Coracobrachialis muscle, biceps, and half of 1/2 of brachialis muscle
32
The median nerve is formed from what?
1/2 of medial cord and 1/2 of lateral cord of the brachial plexus
33
What is the major nerve of the anterior forearm?
The median nerve
34
The median nerve innervates what?
Innervates most of the anterior forearm and muscles of the hand
35
What is the major nerve of the hand?
Ulnar nerve
36
The ulnar nerve is formed from what?
Medial cord
37
The ulnar nerve runs behind what making it susceptible to "bumping" and making the funny bone feeling?
Runs behind medial epicondyle
38
The ulnar nerve innervates what?
Most of the muscles of the hand, flexor carpi ulnaris muscles, and 1/2 of flexor digitorum profundus muscles
39
The axillary nerve is formed from what?
Formed from posterior cord
40
The axillary nerve circles behind the humerus in what space?
Quadrangular space
41
The axillary nerve innervates what?
Innervates deltoid and terres minor muscles
42
The radial nerve is formed from what?
Posterior cord
43
The radial nerve passes posterior to humerus in (1)_____ ______ and within (2)______ ______.
1) Radial groove | 2) Triangular interval
44
What is the major nerve of the posterior arm and forearm?
Radial nerve
45
The radial nerve innervates what?
Innervates all muscles in posterior arm and forearm, and 1/2 of brachialis muscle
46
What are the three upper plexus nerves?
Dorsal scapular nerve (C5), Long thoracic nerve (C5-C7), and Suprascapular nerve (C5-C6)
47
The dorsal scapular nerve innervates what?
Rhomboid and levator scapulae muscles
48
The long thoracic nerve innervates what?
Serratus anterior muscle
49
The suprascapular nerve innervates what?
Supraspinatus and infraspinatus muscles
50
What are the two pectoral nerves?
Lateral pectoral and medial pectoral nerves
51
The lateral pectoral nerve innervates what?
Pectoralis major muscle
52
The medial pectoral nerves innervate what?
Pectoralis major and minor muscles
53
What are the three lower plexus nerves?
Upper subscapular, thoracodorsal, and lower subscapular nn.
54
The upper subscapular nerve innervates what?
Subscapularis muscle
55
The thoracodorsal nerve innervates what?
Latissimus dorsi muscle
56
The lower subscapular nerve innervates what?
Subscapularis and teres major muscle
57
What are the three additional nerves of the brachial plexus?
Nerve to subsclavius m (C5-C6), medial cutaneous nerve (C8-T1), medial antibrachial cutaneous nerve (C8-T1)
58
The medial cutaneous nerve innervates what?
Sensory to medial nerve
59
The medial antibrachial cutaneous nerve innervates what?
Sensory to medial forearm

Anatomy Test Three Material (12 decks)

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