Upper Limb Innervation

Question 1

What bones are involved in the Pectoral Girdle?

Answer 1

Scapula and clavicle

Question 2

The coracoclavicular ligament attached to…

Answer 2

The trapezoid line/conoid tubercle of the clavicle

Question 3

The head of the humerus innervates with the:

Answer 3

Glenoid cavity of the scapula

Question 4

The tendon of the biceps brachii muscle attaches to:

Answer 4

The inter-tubercular sulcus of the humerus

Question 5

The radial nerve follows the..

Answer 5

Radial groove of the humerus

Question 6

The forearm bones

Answer 6

Radius and ulna

Question 7

3 phalange bones

What’s different about the thumb?

3 parts of each phalange bone

Answer 7

Proximal, middle, distal

There is no middle in the thumb

Base, head, shaft

Question 8

Carpal bones

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Answer 8

Scaphoid
Lunate
Triquetrum
Pisiform
Trapezium
Trapezoid
Capitate
Hamate

Question 9

Brachial plexus is formed form the entire ventral rami of

Answer 9

C5-C8 and most of T1

Question 10

Brachial plexus order of nerve structures

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Answer 10

Roots, Trunks, Divisions, Cords, Branches

Question 11

Which roots make up Superior/upper trunk

Answer 11

C5 and C6

Question 12

What roots make up the middle trunk

Answer 12

C7

Question 13

What roots make up the inferior trunk?

Answer 13

C8 and T1

Question 14

Each trunk has a…

Answer 14

Anterior and posterior division

Question 15

Cords are named for their relationship to the..

Answer 15

Axillary artery

Question 16

Cords are formed from __________ and the 3 types are:

Answer 16

Divisions

Lateral, medial, posterior

Question 17

Lateral cord

Answer 17

C5-C7

Anterior division of superior and middle trunks

Question 18

Medial cord

Answer 18

C8 and T1

Anterior division of inferior trunk

Question 19

Posterior cord

Answer 19

C5-T1

Posterior division of all 3

AKA all roots, trunks, and divisions

Question 20

4 supraclavicular branches of the Brachial plexus

Answer 20

Suprascapular nerve
Nerve to subclavius
Dorsal Scapular nerve
Long thoracic nerve

Question 21

13 infraclavicular branches of brachial plexus

Answer 21

3 from lateral cord
5 from medial cord
5 from posterior cord

Question 22

3 infraclavicular branches from Lateral Cord

Answer 22

Lateral pectoral nerve
Musculocutaneous nerve
lateral root of Median Nerve

All C5-C7

Question 23

Infraclavicular branches from Medial Cord

Answer 23

Medial pectoral nerve
Medial brachial cutaneous nerve
Medial antebrachial cutaneous nerve
Ulnar Nerve
Medial root of median nerve

All C8, T1

Ulnar sometimes has C7

Question 24

What roots make up the ulnar nerve?

Answer 24

C8, T1 and occasionally C7

Medial nerve

Question 25

5 infraclavicular branches from posterior cord

Answer 25

``` Upper subcapsular nerve Thoracodorsal nerve Lower subcapsular nerve Axillary nerve Radial nerve ```

Question 26

Roots that supply axillary nerve

Answer 26

C5 C6 Posterior cord

Question 27

Roots that supply radial nerve

Answer 27

C5-T1 Posterior cord

Question 28

root supply to Musculocutaneous nerve

Answer 28

C5-C7 From lateral cord

Question 29

Terminal branch of the lateral cord

Answer 29

Musculocutaneous nerve

Question 30

Innervates muscles of flexor/anterior compartment of the arm

Answer 30

Musculocutaneous nerve

Question 31

When the musculocutaneous nerve passes into the forearm its name becomes...

Answer 31

The lateral cutaneous nerve of the forearm/lateral antebrachial cutaneous nerve

Question 32

Innervates the skin on lateral side of the forearm

Answer 32

Musculocutaneous nerve

Question 33

Formed from the joining of the lateral root of the lateral cord and the medial root of the medial cord

Answer 33

Median nerve

Question 34

Innervate all but 1.5 muscles of the flexor/anterior compartment of the forearm

Answer 34

Median nerve

Question 35

Compression on the carpal tunnel on the causes... Due to what nerve?

Answer 35

Carpal tunnel syndrome Median nerve

Question 36

Innervate the thenar muscles

Answer 36

Median nerve Thumb

Question 37

Terminal branch of the medial cord

Answer 37

Ulnar nerve

Question 38

Innervates 1.5 muscles of the flexor/anterior compartment of the forearm

Answer 38

Ulnar nerve

Question 39

Mainly innervates ALL the hand muscles EXCEPT thumb

Answer 39

Ulnar nerve

Question 40

A terminal branch of the posterior cord

Answer 40

radial nerve

Question 41

Innervates the muscles of the extensor/posterior compartment of the arm

Answer 41

Radial Nerve

Question 42

Innervates ALL muscles of the Extensor/Posterior compartment of the forearm

Answer 42

Radial nerve

Question 43

Nerve to the scapular region, NOT the arm forearm or hand Innervates deltoid muscle and teres minor muscle

Answer 43

Axillary nerve

Question 44

A terminal branch of the posterior cord

Answer 44

Axillary nerve

Question 45

Cutaneous innervation of the Arm, Forearm, and Hand is provided by..

Answer 45

Cutaneous branches of all 5 terminal branches of the brachial plexus AND 4 other smaller branches of the brachial plexus Total of 9 nerves