Brachial Plexus Identification/Origin

Question 1

1

Answer 1

dorsal scapular nerve

origin: ventral ramus of C5
* (and frequent contribution from C4)*

Question 2

2

Answer 2

suprascapular nerve

origin: superior trunk
* often C4,* C5 and C6

Question 3

3

Answer 3

subclavian nerve (nerve to subclavius)

origin: superior trunk
* often C4,* C5 and C6

Question 4

4

Answer 4

long thoracic nerve

origin: ventral rami of C5-7

Question 5

5

Answer 5

lateral pectoral nerve

origin: lateral cord

C5, C6, C7

Question 6

6

Answer 6

medial pectoral nerve

origin: medial cord

C8, T1

Question 7

7

Answer 7

medial cutaneous nerve of arm

origin: medial cord

C8, T1

Question 8

8

Answer 8

medial cutaneous nerve of forearm

origin: medial cord

C8, T1

Question 9

9

Answer 9

upper subscapular nerve

origin: posterior cord

C5 and C6

Question 10

10

Answer 10

thoracodorsal nerve

origin: posterior cord

C6, C7, C8

Question 11

11

Answer 11

lower subscapular nerve

origin: posterior cord

C5 and C6

Question 12

1-4 are ___ branches

Answer 12

supraclavicular

Question 13

5-11 are ___ branches

Answer 13

infraclavicular

Question 14

A

Answer 14

axillary nerve

origin: (terminal branch of) posterior cord

C5 and C6

Question 15

B

Answer 15

musculocutaneous nerve

origin: lateral cord

C5-7

Question 16

C

Answer 16

radial nerve

origin: (terminal branch of) posterior cord

C5-8, T1

Question 17

D

Answer 17

median nerve

Origin: lateral root is a continuation of lateral cord, C6 and C7

medial root is a continuation of medial cord, C8 and T1

Question 18

E

Answer 18

ulnar nerve

origin: (terminal branch of) medial cord
* often C7,* C8 and T1