Anatomy- Axilla and Brachial Plexus

Question 1

where does the brachial plexus originate from

Answer 1

anterior rami of C5-T1

Question 2

what do the chords of the brachial plexus travel around

Answer 2

the brachial artery

Question 3

how do you remember the order of component of the brachial plexus

Answer 3

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roots, trunks, divisions, cords, nerves

Question 4

what happens to the C5 and C6 roots in the brachial plexus

Answer 4

combine into superior trunk

split into anterior and posterior divisions

Question 5

what happens to the anterior division of the superior and middle trunks

Answer 5

join to form lateral chords

Question 6

what combines to give the posterior cord

Answer 6

posterior divisions of the superior, middle and inferior trunks

Question 7

what happens to the C7 root

Answer 7

becomes middle tunk, splits into anterior and posterior divisions

Question 8

what happens to the C8 and T1 roots

Answer 8

combine into inferior trunk and then split into posterior and anterior divisions

Question 9

what happens to the anterior division of the inferior trunk

Answer 9

becomes the medial cord

Question 10

what does the musculo-cutaneous nerve come from

Answer 10

lateral chord

Question 11

what does the axillary and radial nerves come from

Answer 11

posterior cord

Question 12

what does the median nerve come from

Answer 12

lateral and medial cords

Question 13

what does the ulnar nerve come from

Answer 13

medial cord

Question 14

do anterior or posterior rami form the brachial plexus

Answer 14

anterior

Question 15

what does the lateral pectoral nerve come from

Answer 15

lateral chord

Question 16

what does the suprascapular nerve come from

Answer 16

superior trunk

Question 17

where does the nerve to the scapularis come from

Answer 17

superior trunk

Question 18

where does the dorsal scapular nerve come from

Answer 18

C5 root

Question 19

where does the long thoracic nerve come from

Answer 19

C5,6,7 roots

Question 20

where does the upper and lower subscapular nerves come from

Answer 20

posterior chord

Question 21

where does the medial pectoral nerve come from

Answer 21

medial cord

Question 22

where does the medial cutaneous nerve of the arm come from

Answer 22

medial cord

Question 23

where does the medial cutaneous nerve of the forearm come from

Answer 23

medial cord

Question 24

where does the thoracodorsal nerve come from

Answer 24

posterior cord

Question 25

what is the route of the subclavian vein as it passes through the axialla

Answer 25

inferior to the clavicle, superior to the first rib, drains into the internal jugular vein posterior to the sternoclavicular joint

Question 26

where does the axillary vein become the subclavian vein

Answer 26

at the first rib

Question 27

where does the cephalic vein drain into

Answer 27

either the subclavian or axillary veins

Question 28

where is the subclavian artery in relation to the subclavian vein

Answer 28

immediately inferior

Question 29

where are the axillary lymph nodes

Answer 29

within the fascia of the axilla

apical, central and basal

Question 30

where do the apical nodes drain to

Answer 30

drain to the right lymphatic duct/ thoracic duct

Question 31

where do the central lymph nodes drain to

Answer 31

apical nodes

Question 32

where do the basal nodes drain to

Answer 32

the central nodes

Question 33

what are the subgroups of the basal lymph nodes

Answer 33

pectoral (along the lateral border of the pectoralis minor)
subscapular
humeral

Question 34

where do the pectoral nodes receive lymph from

Answer 34

the breast

Question 35

where do the subscapular lymph nodes receive lymph from

Answer 35

scapular region

Question 36

where do humeral lymph nodes get lymph from

Answer 36

receive most of the upper limb lymph