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Flashcards in Brachial Plexus Part 2 Deck (34)
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1

What nerves branch off of the lateral cord of the brachial plexus?

lateral pectoral nerve and musculocutaneous nerve

2

Where does the lateral pectoral nerve receive fibers from?

C5-C7

3

What supplies the pectoralis major?

lateral pectoral nerve (and medial pectoral nerve of the medial cord)

4

What structures combine to form the "M" of the brachial plexus?

lateral cord, medial cord, and musculocutaneous nerve

5

T/F: the musculocutaneous nerve is one of 2 terminal branches of the medial cord.

False; it is one of 2 terminal branches of the LATERAL cord

6

What cord levels contribute fibers to the musculocutaneous nerve?

C5-C7

7

What muscles are supplied by the musculocutaneous nerve?

Corocobrachialis, Biceps brachii (both heads), and the brachialis

8

As the musculocutaneous nerve continues between the biceps brachii and the brachialis into the forearm, what nerve does it become?

the lateral cutaneous nerve of the forearm

9

What nerve supplies skin over the lateral aspect of the forearm, but not the hand?

lateral cutaneous nerve of the forearm

10

What two (major) nerves are supplied by the terminal branches of the lateral cord?

musculocutaneous and median nerves

11

T/F: all of the branches off of the medial cord have "medial" in their name.

False; ulnar nerve, median nerve, and radial nerve are also supplied by the medial cord

12

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

medial pectoral nerve, medial cutaneous (brachial) nerve of the arm, medial cutaneous (antebrachial) nerve of the forearm, the ulnar nerve, and the median nerve.

13

Where does the medial pectoral nerve receive fibers?

C8 and T1

14

What muscles are supplied by the medial pectoral nerve?

pectoralis major and minor

15

Where does the medial cutaneous nerve of the arm receive fibers?

C8 and T1 (and some from T2 through a communication)

16

What nerve supplies the skin of the medial arm between the axilla and the elbow?

medial cutaneous nerve of the arm

17

What nerve does the medial cutaneous nerve of the arm communicate with to receive some fibers from T2?

intercostobrachial nerve

18

What cord leves contribute fibers to the medial cutaneous nerve of the forearm?

C8 and T1

19

Which nerve supplies the skin over the biceps brachii and the skin over the anterior and medial aspects of the forearm distal to the wrist?

medial cutaneous nerve of the forearm

20

T/F: the ulnar nerve is one of two terminal branches of the medial cord.

True

21

What cord levels contribute to the ulnar nerve?

C8, T1, and sometimes C7

22

T/F: the ulnar nerve travels lateral to the brachial artery in the medial bicipital sulcus.

False; travels medial to the brachial artery

23

How many branches does the ulnar nerve give off in the arm?

zero

24

Where does the ulnar nerve cross the elbow?

on the posterior side of the medial epicondyle in the sulcus for the ulnar nerve

25

Where does the ulnar nerve continue into the forearm?

between the two heads of the flexor carpi ulnaris

26

What muscles of the forearm are supplied by the ulnar nerve?

flexor carpi ulnaris and the medial half of the flexor digitorum profundus

27

What sensory branches are given off in the forearm by the ulnar nerve?

dorsal branch of the ulnar nerve and the palmer branch of the unlnar nerve

28

What nerve supplies the skin on the ulnar side of the posterior hand?

dorsal branch of the ulnar nerve

29

What nerve supplies the skin over the hypothenar eminence?

palmar branch of the ulnar nerve

30

T/F: the ulnar nerve travels deep to the flexor carpi ulnaris and passes deep to the flexor retinaculum before dividing into two branches.

False; travels superficial to the flexor retinaculum