Axillary Artery and Brachial Plexus

Question 1

palpable bones of the humerus

Answer 1

greater tubercle of humerus
lateral epicondyle of humerus
medial epicondyle of humerus

Question 2

proximal end of humerus contains

Answer 2

head and anatomical neck
surgical neck
greater and lesser tubercles

Question 3

shaft of humerus contains

Answer 3

deltoid tuberosity
radial groove

Question 4

distal aspect of humerus

Answer 4

medial and lateral epicondyles
capitulum
trochlea
coronoid fossa
olecranan fossa

Question 5

what is the axilla

Answer 5

the pyramidal space inferior to the glenohumeral joint

Question 6

contents of the axilla

Answer 6

axillary artery and its branches
axillary vein and tributaries
axillary lymph nodes
brachial plexus

Question 7

how many sets of lymph nodes

Answer 7

5 sets
most drains into the humeral and central nodes

Question 8

what is the brachial plexus and its divisions

Answer 8

a union of central rami of c5-c8 and t1 nerve roots
divided into roots, trunks, divisions, cords, branches

Question 9

what is the brachial plexus and its divisons

Answer 9

union of central rami of c5-c8 and t1 nerve roots
divided into roots, trunks, divisions, cords, branches

Question 10

components of the brachial plexus

Answer 10

roots C5-T1
trunks (superior, middle and inferior)
divisions (anterior and posterior)
cords (posterior, medial, lateral)
branches (5 total)

Question 11

what nerves branch off the roots

Answer 11

dorsal scapular nerve (c5)
long thoracic nerve (c5-c7)
unnamed muscular branches to deep cervical muscles

Question 12

what are the trunks that form after the roots?

Answer 12

superior (upper) trunk: C5 and C6
middle trunk: C7
Inferior (lower) trunk: C8 and T1

Question 13

what do the roots pass between

Answer 13

anterior and middle scalene muscles

Question 14

what are the nerves that branch off of the trunks

Answer 14

suprascapular (C5 and C6)
nerve to subslavius (C5 and C6)
- subclavius muscle

Question 15

what are the divisions that the trunks divide into

Answer 15

anterior - supply anterior (flexor) compartment in the arm and forearm
posterior - supply posterior (extensor) comparement in arm and forearm

Question 16

the anterior and posterior divisions form 3 cords

Answer 16

lateral cord
posterior cord
medial cord

Question 17

there are 5 terminal branches of the brachial plexus

Answer 17

musculocutanesous, axillary, radial, median, ulnar

Question 18

posterior cord contains what nerves

Answer 18

upper subscapular nerve
lower subscapular nerve
thoracodorsal nerve

Question 19

nerves of medial cord

Answer 19

medial cutanesous nerve of the arm -sensory to medial arm
medial cutaneous nerve of forearm - sensory to medial forearm
medial pectoral nerve

Question 20

nerve of lateral cord

Answer 20

lateral pectoral nerve

Question 21

muscles innervated by musculocutaneous nerve

Answer 21

biceps, brachialis, coracobrachialis

Question 22

muscles innervated by axillary nerve

Answer 22

deltoid and teres minor

Question 23

muscles innervated by radial nerve

Answer 23

triceps/anconeus
extensor compartment in forearm

Question 24

muscles innervated by ulnar nerve

Answer 24

flexor carpi ulnaris
medial part of flexor digitorum profundus
hypothenar muscles
dorsal and palmar interossei
3 and 4 lumbricals
adductor pollicis

Question 25

muscles innervated by the median nerve

Answer 25

most of flexor compartment in forearm (exceptions with the ulnar nerve)
most thenar muscles
1st and 2nd lumbricals

Question 26

movements at the elbow joint

Answer 26

flexion of elbow
extension of elbow

Question 27

muscles of the anterior arm

Answer 27

biceps (short head and long head)
coracobrachialis
brachialis

Question 28

what is the distal continuations of the axillary artery

Answer 28

the brachial artery

Question 29

axillary artery - 1st part location

Answer 29

located between the lateral border of the 1st rib and the medial border of the pectoralis minor

Question 30

axillary artery - 1st part branch

Answer 30

only 1 branch - superior thoracic artery
supplies the first and second intercostal spaces

Question 31

axillary artery - 2nd part

Answer 31

lies posterior to the pec minor
2 branches - thoracromial trunk and lateral thoracic artery

Question 32

thoracoacromial trunk supplies

Answer 32

the shoulder and pectoral muscles

Question 33

the lateral thoracic artery supplies

Answer 33

the serratus anterior

Question 34

axillary artery - 3rd part

Answer 34

lateral border of pec minor to the inferior border of teres major
3 branches

Question 35

3 branches of axillary artery 3rd part

Answer 35

• subscapular a
  anterior humeral circumflex
  posterior humeral circumflex

Question 36

subscapular artery branches to

Answer 36

circumflex scapular (participates in anastomosis around shoulder)
thoracodorsal (supplies latissimus dorsi)

Question 37

anterior humeral circumflex branches to

Answer 37

anastomoses with posterior humeral circumflex

Question 38

posterior humeral circumflex supplies

Answer 38

supplies deltoid, teres major and minor and long head of the triceps

Question 39

the posterior division of the brachial plexus suppies…

Answer 39

posterior - supply posterior (extensor) comparement in arm and forearm

Question 40

the anterior division of the brachial plexus supplies…

Answer 40

anterior - supply anterior (flexor) compartment in the arm and forearm

Question 41

how is the lateral cord formed

Answer 41

anterior divisions of the superior and middle trunks combine

Question 42

how is the posterior cord formed

Answer 42

by the posterior divisions of all 3 trunks (superior, middle, inferior trunks)

Question 43

how is the medial cord formed

Answer 43

by the anterior division of the posterior cord