Nerves and Blood supply of upper limb

Question 1

What is the passage of blood in the upper limb?

Answer 1

Arch of the aorta
Brachiocephalic artery
Right subclavian artery
Axillary artery
Brachial artery
Radial/ ulna artery

Question 2

What are the collateral arteries and what are their function?

Answer 2

Radial collateral artery

Superior and inferior ulnar collateral artery

Found around joints to allow continuous blood supply during movement at the joints

Question 3

What gets compressed when you pronate the arm?

Answer 3

Radial artery

Question 4

Motor of musculocutaneous nerve

Answer 4

Anterior upper arm flexors
BBC

Biceps brachialis
Brachialis
Coracobrachialis

Question 5

Sensory musculocutaneous

Answer 5

Skin of the lateral forearm

Question 6

Motor of the axillary nerve

Answer 6

Deltoid and teres minor (adduction of the arm)

Question 7

Sensory of the axillary nerve

Answer 7

Skin on the deltoid muscles (regimental badge)

Question 8

Where does the median nerve run?

Answer 8

Medial to the biceps brachii with brachial artery
Anteriorly at the cubital fossa to enter forearm

Supplies majority of the flexor compartment

Passes through carpal tunnel and supplies muscle of the thumb

Question 9

Motor of median nerve

Answer 9

Flexors forearm

Thumb

Question 10

Sensory of median nerve

Answer 10

Skin of digits 1,2,3,3.5

Back of the hand - Top of the fingers 1,2,3 and top of the thumb

Question 11

Where does the radial nerve run?

Answer 11

Passes into the posterior compartment of the arm

Runs into the radial groove deep to triceps brachii

Question 12

Motor of radial nerve

Answer 12

All muscles posterior aspect of arm and forearm

Extensors of upper arm and forearm

Question 13

Sensory of the radial nerve

Answer 13

Skin over the posterior arm to wrist

Posterior Dorsal hand base of digits 1-3 and thumb

Question 14

Where does the ulnar nerve run?

Answer 14

Runs medially in the arm and passes posterior to the medial epicondyl of the humerus

Question 15

Motor of the ulna nerve

Answer 15

Some forearm flexors: Flexor carpi ulnaris and ulnar half of flexor digitorum profoundus in the forearm

Most of the intrinsic muscles in the hand

Question 16

Sensory of the ulna nerve

Answer 16

Skin over medial dorsal and plantar hand

Anterior and posterior Digits 3.5,4,5

Question 17

Roots of axillary

Answer 17

C5 6

Question 18

Roots of radial

Answer 18

C5 6 7 8 T1

Question 19

Roots of musculocutaneous

Answer 19

C5 6 7

Question 20

Roots of median

Answer 20

C5 6 7 8 T1

Question 21

Roots of ulnar

Answer 21

C8 T1

Question 22

Name 3 important nerves from the brachial plexus that do not enter the upper limb

Answer 22

Long Thoracic - serratus anterior
(Under armpit like a T shirt)
Roots: C5 C6 C7

Thoracodorsal nerve - latissimus dorsi
(Mid to lower back)
Roots: C6 C7 C8

Suprascapular nerve - supraspinatus, infraspinatus
(Posterior - over the scapula)
Roots: C5, C6

Question 23

What are the main points of the brachial plexus?

Answer 23

Roots
Trunks
Divisions
Cords
Branches

Read that dang cadaver book

Question 24

What is Erb’s Palsy?

Answer 24

Problem with axillary nerve (deltoids)
Medially rotated arm (waiters tip)
Extended elbow (musculocutaneous nerve)

Due to an extensive angle between the shoulder and neck, pulled out of womb by the head

Question 25

What is Klumpke’s Palsy?

Answer 25

Injury to inferior roots of the brachial plexus (less common that injury to the superior roots)

Claw
Affecting C8 and T1

Question 26

Name the superficial veins in the upper limb

Answer 26

Cephalic (lateral), basilic (medial), median cubital

Dorsal venous network (behind the hand)

Question 27

Name some deep veins in the upper limb

Answer 27

Subclavian vein (and artery)
Axillary vein (and artery)
Brachial vein (and artery)
Radial vein (and artery)
Ulnar vein (and artery)