1. Brachial plexus

Question 1

Spinal roots of Musculocutaneous nerve.

Answer 1

C5, C6, C7

Question 2

Spinal roots of Median nerve.

Answer 2

C6, C7, C8 and T1

Question 3

Spinal roots of Radial nerve.

Answer 3

C5, C6, C7, C8 and T1.

Question 4

Spinal roots of Ulnar nerve.

Answer 4

C8 and T1.

Question 5

Spinal roots of Axillary nerve.

Answer 5

C5 and C6.

Question 6

Location of nerve roots for the cervical region.

Answer 6

Cervical - nerve above corresponding vertebrae.

Except C8 is found above T1 and below C7.

Question 7

Spinal root of dorsal scapular nerve.

Answer 7

C5.

Question 8

Spinal root of long thoracic nerve.

Answer 8

C5, C6 & C7.

Question 9

Muscles innervated by dorsal scapular nerve & their functions.

Answer 9

Levator scapulae, major & minor rhomboids.

Rhomboids - retract, elevate and rotate the scapula.

Question 10

Muscle innervated by long thoracic nerve.

Answer 10

Serratus anterior.

Question 11

Which trunk does the supra-scapular nerve arise from?

Answer 11

Superior trunk.

Question 12

Which nerves arise from the lateral cord?

Answer 12

Lateral pectoral nerve.

Question 13

Which nerves arise from the medial cord?

Answer 13

Medial pectoral nerve, medial (brachial) cutaneous nerve of the arm & medial cutaneous nerve of the forearm .

Question 14

Which nerves arise from the posterior cord?

Answer 14

Upper & lower sub-scapular nerve and thoraco-dorsal nerve.

Question 15

Which muscles does the Lateral pectoral nerve innervate?

Answer 15

Clavicular head of pectoralis major

Question 16

Which muscles does the Medial pectoral nerve innervate?

Answer 16

Pectoralis minor and sternal head of pec major.

Question 17

Which muscles do the Upper & lower sub-scapular nerve innervate?

Answer 17

Sub-scapularis & teres major.

Question 18

Which groups of muscles does the median nerve innervate?

Answer 18

Forearm flexors and thenar muscles.

Question 19

Which groups of muscles does the radial nerve innervate?

Answer 19

Triceps and forearm extensors.

Question 20

Which muscles does the ulnar nerve innervate?

Answer 20

Ulnar 1/2 of flexor digitorum profundus.
Flexor carpi ulnaris.
Hypothenar muscles.