2. nerve and blood supply to upper limb

Question 1

stem (main) artery

Answer 1

subclavian artery
right - from brachiocephalic trunk
left - from arch of aorta

Question 2

subclavian artery path

Answer 2

passes through scalene triangle (over first rib)
divided into 3 parts by scalenus anterior
1st: medial to muscle
2nd: behind muscle
3rd: lateral to muscle
becomes axillary artery

Question 3

dorsal scapular artery

Answer 3

from 2nd/3rd part of subclavian

contributes to scapular anastomosis

Question 4

thyrocervical trunk

Answer 4

from first part of subclavian artery

contributes to scapula anastomosis

Question 5

when does subclavian become axillary artery?

Answer 5

as it crosses outer border of first rib

Question 6

axillary artery

Answer 6

divided into 3 parts by pectoralis major 
1st: medial to muscle 
2nd: behind muscle
3rd: lateral to muscle 
ends at lower part of teres  major 
becomes brachial artery

Question 7

branches of axillary

Answer 7

subscapular artery - to scapular anastomosis

anterior/posterior circumflex humeral - to neck/shaft of humerus

Question 8

brachial artery

Answer 8

superficial
supplies flexors
contributes to anastomosis around elbow
terminates in cubital fossa: ulnar and radial
large branch = profunda brachia artery (supplies extensors)

Question 9

profunda brachii artery

Answer 9

branch of brachial
accompanies radial nerve in spiral groove
supplies arm extensors (triceps)

Question 10

radial artery

Answer 10

lateral side of forearm
smaller of the 2 terminal branches 
covered by brachiradialirs 
forms deep palmar arch 
winds around dorsum of hand at wrist 
passes through anatomical snuffbox

Question 11

ulnar artery

Answer 11

medial side of forearm
covered by flexor carpi ulnaris muscle
gives off deep branch - common interosseous artery
forms superficial palmar arch

Question 12

deep veins

Answer 12

paired - run which arteries of same name
venae comitantes
drain into axillary vein

Question 13

superficial veins

Answer 13

cephalic
basilic
drain into axillary vein
connected by median cubital vein at elbow

Question 14

brachial plexus

Answer 14

nerve supply to upper limb
mixed nerves
divided into roots, trunks, divisions and cords

Question 15

roots

Answer 15

ventral primary rami of C5-T1

motor axons within each root innervate different functional group of muscles

Question 16

c5 root

Answer 16

shoulder abduction and adduction

Question 17

c6/c7 roots

Answer 17

elbow flexion and extension

Question 18

c7/c8 roots

Answer 18

wrist flexion and extension

Question 19

c8/t1 roots

Answer 19

movement of digits

Question 20

trunks

Answer 20

from roots
pass through scalene muscles 
superior (C5, C6)
middle (C7) 
inferior(C8, T1)

Question 21

divisions

Answer 21

from trunks

each trunk divides into anterior and posterior divisions

Question 22

anterior divisions

Answer 22

axons to flexor compartments

forms lateral and medial cords

Question 23

posterior divisions

Answer 23

axons to extensor compartments

forms posterior cord

Question 24

cords

Answer 24

under pectoralis major
cord named in relation axillary artery 
lateral
posterior
medial

Question 25

terminal branches of lateral cord

Answer 25

musculocutaneous nerve | lateral part of median nerve

Question 26

musculocutaneous nerve

Answer 26

motor to anterior arm | sensory to lateral forearm

Question 27

terminal branches of medial cord

Answer 27

medial part of median nerve | ulnar nerve

Question 28

median nerve

Answer 28

motor to anterior forearm and lateral hand | sensory to lateral palm, d1, d2, d3 and 1/2 d4

Question 29

ulnar nerve

Answer 29

motor to medial side anterior forearm and hand | sensory to medial hand and 1/2 d4, d5

Question 30

terminal branches of posterior cord

Answer 30

radial nerve | axillary nerve

Question 31

radial nerve

Answer 31

motor to posterior arm and posterior forearm | sensory to posterior arm and posterior forearm and lateral dorsum of hand

Question 32

axillary nerve

Answer 32

motor to deltoid and teres minor | sensory to badge area