Upper Extremity Neurology

Question 1

Cervical Plexus

Anterior Rami C1-C4

Answer 1

Supraclavicular Nerve (Middle, Lateral and Medial)
    Cutaneous nerve for shoulder and neck

Question 2

Brachial Plexus

Roots Region

Answer 2

Anterior Rami (C5- C8, T1)
Dorsal Scapular N.
Long Thoracic N.
Muscular Branches

Question 3

Brachial Plexus

Trunks Region

Answer 3

Superior Trunk
Suprascapular N., Subclavian N.
Middle Trunk
Inferior Trunk

Question 4

Brachial Plexus

Divisions Region

Answer 4

No Branches
Anterior Division in front of Axillary A.
Posterior Division behind Axillary A.

Question 5

Brachial Plexus

Cords Region

Answer 5

Lateral Cord
Medial Cord
Posterior Cord

Question 6

Lateral Cord Branch

Answer 6

Lateral Pectoral N. (pec. major m.)

Question 7

Medial Cord Branches

Answer 7

Medial Pectoral N. (pec major/minor ms.)
Medial Brachial Cutaneous N.
Medial Antebrachial Cutaneous N.

Question 8

Posterior Cord Branches

Answer 8

Superior Subscapular N.
Inferior Subscapular N. (teres major)
Thoracodorsal N.

Question 9

Brachial Plexus

Terminal Branches Region

Answer 9

5 Major Branches:
Musculocutaneous N.
Axillary N.
Median N.
Ulnar N.
Radial N.

Question 10

Musculocutaneous Nerve and Branch

Answer 10

Innervates Anterior Arm Muscles

Lateral Antebrachial Cutaneous N.
Innervates Lateral Forearm Skin

Question 11

Axillary Nerve and Branch

Answer 11

Innervates Deltoid M. and Teres Minor M.

Superior Lateral Brachial Cutaneous N.
Superior Lateral Brachial Skin

Question 12

Median Nerve and Branches

Answer 12

Innervates Pronator Teres, Flexor Carpi Radialis, Flexor Digitorum Superficialis and Palmaris Longus

Anterior Interosseous N.
Palmar Cutaneous Branch of Median N.
Recurrent Branch of Median N.
Medial Branch Median N.
Lateral Branch Median N.

Question 13

Anterior Interosseous Nerve Innervation

Answer 13

Lateral Half Flexor Digitorum Profundus M.
Flexor Pollicis Longus M.
Pronator Quadratus M.

Question 14

Palmar Cutaneous Branch of Median Nerve Innervation

Answer 14

Central Palm Skin

Question 15

Recurrent Branch of Median Nerve Innervation

Answer 15

Superficial Flexor Pollicis Brevis M.
Abductor Pollicis Brevis M.
Opponens Pollicis M.

Question 16

Lateral Branch of Median Nerve and Branch

Answer 16

Innervates 1st Lumbrical M.

Common Palmar Digital N.
Proper Palmar Digital N. (for lateral 2 digits)

Question 17

Medial Branch of Median Nerve and Branches

Answer 17

Innervates 2nd Lumbrical

Common Palmar Digital N.
Proper Palmar Digital N. (medial 2nd digit-lateral 4th digit)

Question 18

Ulnar Nerve and Branches

Answer 18

Innervates Flexor Carpi Ulnaris M. and Medial Half Flexor Digitorum Profundus M.

Dorsal Cutaneous Branch Ulnar N.
Palmar Cutaneous Branch Ulnar N.
Superficial Ulnar N.
Deep Ulnar N.

Question 19

Dorsal Cutaneous Nerve and Branch

Answer 19

Innervates medial dorsal hand skin

Dorsal Digital N.

Question 20

Palmar Cutaneous Branch of Ulnar Nerve

Answer 20

Innervates distal antebrachial skin and medial palm skin

Question 21

Deep Ulnar Nerve

Answer 21

Innervates:
Deep Flexor Pollicis Brevis M.
Adductor Pollicis M.
3rd and 4th Lumbrical Ms.
Dorsal Interosseous Ms.
Palmar Interosseous Ms.
Abductor Digiti Minimi M.
Flexor Digiti Minimi M.
Opponens Digiti Minimi M.

Question 22

Superficial Ulnar Nerve Branches

Answer 22

Common Palmar Digital N.

Proper Palmar Digital N. (medial 4th-5th digits)

Question 23

Radial Nerve and Branches

Answer 23

Innervates: Triceps Brachii, Anconeus, Brachioradialis and Extensor Carpi Radialis Longus Ms.

Posterior Brachial Cutaneous N.
Inferior Lateral Brachial Cutaneous N. 
Superficial Radial N. 
Deep Radial N. 
Posterior Interosseous N. (Deep Radial after supinator)
Posterior Antebrachial Cutaneous N.

Question 24

Deep Radial Nerve

Answer 24

Innervates Supinator M. And Extensor Carpi Radialis Brevis M.

Becomes Posterior Interosseous N. after supinator m.

Question 25

Posterior Interosseous Nerve

Answer 25

Innervates:
Extensor Digitorum M.
Extensor Digiti Minimi M.
Extensor Carpi Ulnaris M. 
Extensor Indicis M. 
Abductor Pollicis Longus M. 
Extensor Pollicis Longus M. 
Extensor Pollicis Brevis M.

Question 26

Superficial Radial Nerve and Branches

Answer 26

Innervates Lateral Dorsal skin

Dorsal Digital N.
Digits 1-Lateral 4th

Question 27

Thoracic Spinal Nerves

Answer 27

Intercostobrachial N.

Upper Medial Brachial Cutaneous innervation