Nerves From The Brachial Plexus

Front 1

What is the origin of the dorsal scapular nerve?

Back 1

C5 root.

Front 2

What is the function of the dorsal scapular nerve?

Back 2

Motor to rhomboid minor and rhomboid major.

Front 3

What is the origin of the long thoracic nerve?

Back 3

The roots of C5, 6 and 7.

Front 4

What is the function of the long thoracic nerve?

Back 4

Motor, innervates serratus anterior.

Front 5

What is the origin of the supra scapular nerve?

Back 5

Superior trunk, carries fibres from C5 and 6.

Front 6

What is the function of the supra scapular nerve?

Back 6

Motor, innervates supraspinatus and infraspinatus.

Front 7

What is the origin of the nerve to subclavius?

Back 7

Superior trunk, C5 and 6.

Front 8

What is the function of the nerve to subclavius?

Back 8

Motor, innervates the subclavius muscle.

Front 9

What is the origin of the lateral pectoral nerve?

Back 9

Lateral cord, C5, 6 and 7 anterior divisions.

Front 10

What is the function of the lateral pectoral nerve?

Back 10

Motor, innervates pectoralis major.

Front 11

What is the origin of the musculocutaneous nerve?

Back 11

Lateral cord, anterior devisions of C5, 6 and 7.

Front 12

What is the function of the musculocutaneous nerve?

Back 12

Motor, innervates biceps brachii, brachialis and coracobracialis.

Sensory, supplies the lateral aspect of the forearm as its terminal branch the lateral cutaneous nerve of the forearm.

Front 13

*What is the origin of the lateral cutaneous nerve of the forearm? What is its function?

Back 13

Musculocutaneous nerve, C5, 6 and 7.

Supplies sensation to the lateral aspect of the forearm.

Front 14

What is the origin of the median pectoral nerve?

Back 14

Median cord, anterior divisions of C8 and T1, although also receives communicates from the lateral pectoral nerve so also C5, 6 and 7.

Front 15

What is the origin of the median cutaneous nerve of the arm?

Back 15

Median cord, C8 and T1.

Front 16

What is the function of the median cutaneous nerve of the arm?

Back 16

Sensory, the median side of the distal one third of the arm.

Front 17

What is the origin of the median cutaneous nerve of the forearm?

Back 17

Median cord, C8 and T1.

Front 18

What is the function of the median cutaneous nerve of the forearm?

Back 18

Sensory, the median side of the forearm.

Front 19

What is the origin of the median nerve?

Back 19

Lateral and medial cords, (C5), C6-T1.

Front 20

What is the function of the median nerve?

Back 20

Motor, all muscles of the anterior compartment of the forearm apart from flexor carpi ulnaris and the medial half of flexor digitorum profundus. Also innervates the three thenar muscles and two lateral lumbrical muscles.

Sensory, palmer surface of the lateral 3 and a half digits, over the lateral half of the palm and middle of the wrist.

Front 21

What is the origin of the ulnar nerve?

Back 21

Medial cord, (C7) C8 and T1.

Front 22

What is the function of the ulnar nerve?

Back 22

Motor, supplies all the muscles of the hand apart from two lateral lumbricals and the three thenar muscles supplied by the median nerve. Also supplies flexor carpi ulnaris and the medial aspect of flexor digitorum profundus.

Sensory, skin over the palmar surface of the median 1 and a half digits, median half of the palm the associated area of the wrist. Also supplies the dorsal surface of the medial 1 and a half digits.

Front 23

What is the origin of the superior sub scapular nerve?

Back 23

Posterior cord, posterior divisions of C5 and 6.

Front 24

What is the function of the superior sub scapular muscles?

Back 24

Motor, supplies subscapularis.

Front 25

What is the origin of the thoracodorsal nerve?

Back 25

Posterior cord, posterior divisions of C6, 7 and 8.

Front 26

What is the function of the thoracodorsal nerve?

Back 26

Motor, latissimus dorsi.

Front 27

What is the origin of the inferior subscapular nerve?

Back 27

Posterior cord, posterior divisions of C5 and 6.

Front 28

What is the function of the posterior sub scapular nerve?

Back 28

Motor, subscapularis and teres major.

Front 29

What is the origin of the axillary nerve?

Back 29

Posterior cord, C5 and 6.

Front 30

What is the function of the axillary nerve?

Back 30

Motor, supplies the deltoid muscle and teres minor.

Sensory, skin over the lateral part of the upper arm.

Front 31

What is the origin of the radial nerve?

Back 31

Posterior cord, C5, 6, 7 and 8. Some innervation from T1.

Front 32

What is the function of the radial nerve?

Back 32

Motor, all muscles of the posterior compartment of the arm and forearm.

Sensory, skin on the posterior aspects of the arm and forearm. The skin on the dorsal lateral aspect of the hand. Inferior lateral cutaneous nerve of the arm, posterior cutaneous nerve of the forearm.

Front 33

*What is the origin of the inferior lateral cutaneous nerve of the arm? What is its function?

Back 33

A branch of the radial nerve (C5, 6, 7, 8 (T1)), supplies the lower lateral aspect of skin on the arm.

Front 34

*What is the origin of the posterior cutaneous nerve of the forearm? What is its function?

Back 34

A branch of the radial nerve (C5, 6, 7, 8, (T1)), supplies the skin on the posterior of the forearm.