Fcns of axons (peripheral nn. brachial plexus)

Question 1

Dorsal scapular nerve (C4-5)

Answer 1

function- postganglionic sympathetic & motor (not sensory ) to levator scapulae & rhomboid muscles

Question 2

Long thoracic nerve (C5-7)

Answer 2

function- sensory , postganglionic sympathetic & motor to serratus anterior muscle

Question 3

Suprascapular nerve (C4-6)

Answer 3

function- sensory , postganglionic sympathetic & motor innervation of the supraspinatus & infraspinatus muscles

Question 4

Subclavian nerve (C5-6)

Answer 4

function- sensory, postganglionic sympathetic & motor innervation of the subclavius muscle

Question 5

Lateral pectoral nerve (C5-7)

Answer 5

function- sensory, postganglionic sympathetic & motor innervation of the pectoralis major (clavicular head) & minor muscles

Question 6

Musculocutaneous nerve (C5-7)

Answer 6

function- sensory, postganglionic sympathetic & motor innervation of the biceps brachii, coracobrachialis & brachialis muscles

Question 7

Medial pectoral nerve (C8-T1)

Answer 7

function- sensory, postganglionic sympathetic & motor innervation of the pectoralis major (sternocostal) & minor muscles

Question 8

Muscular branches in the forearm:
Ulnar nerve (C7-T1)

Answer 8

function- sensory, postganglionic sympathetic & motor innervation of the flexor carpi ulnaris & flexor digitorum profundus muscles

Question 9

Upper subscapular nerve (C5-6)

Answer 9

function- sensory, postganglionic sympathetic & motor innervation of the subscapularis muscle

Question 10

Thoracodorsal nerve (C6-8)

Answer 10

function- sensory, postganglionic sympathetic & motor innervation of the latissimus dorsi muscle

Question 11

Lower subscapular nerve (C5-6)

Answer 11

function- sensory, postganglionic sympathetic & motor innervation of the subscapularis & teres major muscles

Question 12

Muscular branches in the arm:
Axillary nerve (C5-6)

Answer 12

function- sensory, postganglionic sympathetic & motor innervation of the deltoid & teres minor muscles

Question 13

Muscular branches in the arm:
Radial nerve (C5-T1)

Answer 13

function- sensory, postganglionic sympathetic & motor innervation of the triceps brachii & brachialis muscles

Question 14

Medial cutaneous nerves of the arm & forearm (C8-T1)

Answer 14

function- sensory & postganglionic sympathetic innervation of the skin overlying the medial aspect of the arm & forearm

Question 15

muscular branch:

Medial root of the median nerve (C8-T1) and lateral root of the median nerve (C5-7)

Answer 15

function- sensory, postganglionic sympathetic & motor innervation of the flexor carpi radialis, palmaris longus, flexor digitorum superficialis, & pronator teres muscles

Question 16

Anterior interosseous nerve:

Medial root of the median nerve (C8-T1) and lateral root of the median nerve (C5-7)

Answer 16

function- sensory, postganglionic sympathetic & motor innervation of the flexor pollicis longus, flexor digitorum profundus & pronator quadratus muscles

Question 17

Palmar cutaneous branch:

Medial root of the median nerve (C8-T1) and lateral root of the median nerve (C5-7)

Answer 17

function- sensory & postganglionic sympathetic innervation of the skin overlying the radial aspect of the palm of the hand

Question 18

Muscular branches in the hand:

Medial root of the median nerve (C8-T1) and lateral root of the median nerve (C5-7)

Answer 18

function- sensory, postganglionic sympathetic & motor innervation of the lateral two lumbrical muscles

Question 19

Recurrent branch of the median nerve (C6-T1):

Medial root of the median nerve (C8-T1) and lateral root of the median nerve (C5-7)

Answer 19

function- sensory, postganglionic sympathetic & motor innervation of the flexor pollicis brevis, abductor pollicis brevis & opponens pollicis muscles

Question 20

Common & proper palmar digital nerves:

Medial root of the median nerve (C8-T1) and lateral root of the median nerve (C5-7)

Answer 20

function- sensory & postganglionic sympathetic innervation of the skin overlying digits 1-4

Question 21

Muscular branches (deep & posterior interosseous nn.) in the forearm:
 Radial nerve (C5-T1)

Answer 21

function- sensory, postganglionic sympathetic & motor innervation of the anconeus, brachioradialis, supinator, extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris, extensor digitorum, extensor digiti minimi, extensor indicis, extensor pollicis brevis, extensor pollicis longus & abductor pollicis longus muscles

Question 22

Posterior cutaneous nerve of the forearm:
 Radial nerve (C5-T1)

Answer 22

function- sensory & postganglionic sympathetic innervation of the skin overlying the posterior aspect of the forearm

Question 23

Superficial (terminal) branch:
 Radial nerve (C5-T1)

Answer 23

function- sensory & postganglionic sympathetic innervation of the skin overlying the radial side of the dorsum of the hand

Question 24

Superior lateral cutaneous nerve of the arm:
Axillary nerve (C5-6)

Answer 24

function- sensory & postganglionic sympathetic innervation of the skin overlying the superior lateral aspect of the arm

Question 25

Palmar (cutaneous) branch:
Ulnar nerve (C7-T1)

Answer 25

function- sensory & postganglionic sympathetic innervation of the skin overlying the ulnar side of the palm

(1) Common palmar digital nerves (supplying digits 4 & 5)
(a) Proper palmar digital nerves

Question 26

Dorsal (cutaneous) branch:
Ulnar nerve (C7-T1)

Answer 26

function- sensory & postganglionic sympathetic innervation of the skin overlying the dorsal surfaces of digits 4 & 5

Question 27

Deep (terminal) branch (C8-T1):
Ulnar nerve (C7-T1)

Answer 27

function- sensory, postganglionic sympathetic & motor innervation of the abductor digiti minimi, flexor digiti minimi, flexor pollicis brevis, opponens digiti minimi, palmar interossei, dorsal interossei, medial two lumbricals & adductor pollicis muscles

Question 28

Lateral cutaneous nerve of the forearm: 
Musculocutaneous nerve (C5-7)

Answer 28

function- sensory & postganglionic sympathetic innervation of the skin overlying the lateral aspect of the forearm