2. nerve and blood supply to upper limb Flashcards Preview

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Flashcards in 2. nerve and blood supply to upper limb Deck (32)
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1

stem (main) artery

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

2

subclavian artery path

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

3

dorsal scapular artery

from 2nd/3rd part of subclavian
contributes to scapular anastomosis

4

thyrocervical trunk

from first part of subclavian artery
contributes to scapula anastomosis

5

when does subclavian become axillary artery?

as it crosses outer border of first rib

6

axillary artery

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

7

branches of axillary

subscapular artery - to scapular anastomosis
anterior/posterior circumflex humeral - to neck/shaft of humerus

8

brachial artery

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

9

profunda brachii artery

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

10

radial artery

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

11

ulnar artery

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

12

deep veins

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

13

superficial veins

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

14

brachial plexus

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

15

roots

ventral primary rami of C5-T1
motor axons within each root innervate different functional group of muscles

16

c5 root

shoulder abduction and adduction

17

c6/c7 roots

elbow flexion and extension

18

c7/c8 roots

wrist flexion and extension

19

c8/t1 roots

movement of digits

20

trunks

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

21

divisions

from trunks
each trunk divides into anterior and posterior divisions

22

anterior divisions

axons to flexor compartments
forms lateral and medial cords

23

posterior divisions

axons to extensor compartments
forms posterior cord

24

cords

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

25

terminal branches of lateral cord

musculocutaneous nerve
lateral part of median nerve

26

musculocutaneous nerve

motor to anterior arm
sensory to lateral forearm

27

terminal branches of medial cord

medial part of median nerve
ulnar nerve

28

median nerve

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

29

ulnar nerve

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

30

terminal branches of posterior cord

radial nerve
axillary nerve