Upper Limb 1 - Station 1

Question 1

muscles of anterior wall of the axilla

Answer 1

pectoralis major and minor

Question 2

muscles of posterior wall of the axilla

Answer 2

subscapularis, teres major and latissimus dorsi

Question 3

medial wall of axilla

Answer 3

thoracic wall and serratus anterior muscle

Question 4

bony area of lateral wall of axilla

Answer 4

intertubercular sulcus of humerus

Question 5

which of the following structures is not in the axilla

a. axillary artery
b. brachial plexus
c. bracial artery
d. axilary vein
e. axillary lymph nodes

Answer 5

c. brachial artery

Question 6

where does the axillary artery begin (bony landmark)

Answer 6

lateral border of 1st rib

Question 7

roots of brachial plexus

Answer 7

C5-T1

Question 8

what is Erb’s point

Answer 8

point of upper trunk - 2-3cm above clavicle

common site of injury in birth causing a palsy

Question 9

clinical sign of damage at erb’s point

Answer 9

“waiter’s tip”, arm medially rotated and wrist flexed

Question 10

divisions of brachial plexus roots into trunks

Answer 10

C5 + C6 = upper trunk
C7 = middle trunk
C8 + T1 = lower trunk

Question 11

all the anterior/posterior branches of the brachial plexus trunks unite to form the lateral/posterior/medial cord

Answer 11

posterior branches unite to form the posterior cord

Question 12

anterior branches of which two trunks form the lateral cord

Answer 12

upper and middle

Question 13

origin of the medial cord

Answer 13

lower trunk anterior branch

Question 14

injury to lower trunk of brachial plexus is called what

Answer 14

Klumpke’s palsy

Question 15

muscles affected in Klumpke’s palsy

Answer 15

intrinscic hand muscles, flexors of wrist and fingers

Question 16

what movement causes Klumpke’s palsy

Answer 16

undue abduction of the arm

Question 17

what events cause Erb’s palsy

Answer 17

fall on shoulder or birth

Question 18

what structure are the 3 cords of brachial plexus named in relation to

Answer 18

axillary artery

Question 19

musculocutaneous nerve is from which cord

Answer 19

lateral cord

Question 20

which cord do the ulnar and median nerves originate from

Answer 20

medial cord

Question 21

axillary and radial nerves are from which cord

Answer 21

posterior cord

Question 22

name 2 nerves which come from the medial cord

Answer 22

ulnar and median nerves

Question 23

which cord gives off:

• thoracodorsal
• axillary
• radial
• upper and lower subscapular

Answer 23

posterior cord

Question 24

which cord gives off:

• lateral pectoral
• lateral root of median nerve
• musculocutaneous

Answer 24

lateral cord