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Flashcards in Week 6 Deck (226)
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1

The brachial plexus is the innervation to the __ and ___

The brachial plexus is the innervation to the *shoulder and upper extremity*

2

What forms the brachial plexus?

Formed by ventral primary rami C5 – C8 and part of T1

3

What are the parts that the brachial plexus can be divided into?

• Roots (ventral primary rami)
• Trunks
• Divisions
• Cords
• Terminal Branches

4

The cords of the brachial plexus are named in relationship to the ___

The cords of the brachial plexus are named in relationship to the *axillary artery in the axilla*

5

What are the terminal branches of the brachial plexus?

- Musculocutaneous
- Axillary
- Radial
- Median
- Ulnar

6

What roots in the brachial plexus forms the superior trunks?

Ventral primary rami of C5 and C6

7

What roots in the brachial plexus forms the middle trunks?

Ventral primary rami of C7

8

What roots in the brachial plexus forms the inferior trunks?

Ventral primary rami of C8 and T1

9

The 3 posterior divisions of the brachial plexus, forms the ___ cord

The 3 posterior divisions of the brachial plexus, forms the *posterior* cord

10

The anterior division of the upper and middle trunks of the brachial plexus forms the ___ cord

The anterior division of the upper and middle trunks of the brachial plexus forms the *lateral* cord

11

The anterior division of the lower trunk of the brachial plexus forms the ____ cord

The anterior division of the lower trunk of the brachial plexus forms the *medial* cord

12

What terminal branches does the lateral cord give rise to?

- Musculocutaneous nerve
- Lateral part of the Median nerve

13

What terminal branches does the medial cord give rise to?

- Medial part of the Median nerve
- Ulnar nerve

14

What terminal branches does the posterior cord give rise to?

- Axillary nerve
- Radial nerve

15

What are the nerve roots of the phrenic nerve?

C3, C4, and C5

16

Why do we think of the phrenic nerve as part of the brachial plexus?

Because of its C5 nerve root

17

What is the nerve root of the dorsal scapular nerve?

C5

18

What is the nerve root of the long thoracic nerve?

C5, C6, C7

19

What are the other branches of the ventral primary rami?

- Phrenic nerve
- Dorsal scapular nerve
- Long thoracic nerve

20

What are the branches that comes off the upper trunk of the brachial plexus?

- Suprascapular nerve
- Nerve to the subclavius

21

What are the branches that comes off the middle and lower trunk of the brachial plexus?

NONE

22

What are the branches that comes off the medial cord of the brachial plexus?

- Medial pectoral nerve
- Medial brachial(arm) cutaneous
- Medial antebrachial(forearm) cutaneous

23

What are the branches that comes off the lateral cord of the brachial plexus?

- Lateral pectoral nerve

24

What are the branches that comes off the posterior cord of the brachial plexus?

- Upper/superior subscapular nerve
- Lower/inferior subscapular nerve
- Thoracodorsal nerve

25

The medial pectoral nerve sends branches to the ____

The medial pectoral nerve sends branches to the *pec minor*

26

What 2 structures does the lateral pectoral nerve tend to send branches to?

- Deep branch – sternal head of pec major
- Sup branch – clavic head of pec major

27

What are the nerve roots of the musculocutaneous nerve?

C5-C7

28

What are the nerve roots of the median nerve?

C6-C8, T1

29

What are the nerve roots of the radial nerve?

C5- C8, T1

30

What are the nerve roots of the ulnar nerve?

C7-C8, T1