Upper Limb 2 - Station 4

Question 1

muscles of the posterior compartment of the arm

Answer 1

triceps and anconeus

Question 2

3 origins of the triceps

Answer 2

long head - infraglenoid tubercle of the scapula
lateral head - posterior surface of humerus, just ABOVE radial groove
medial head - posterior surface of humerus, just BELOW radial groove

Question 3

what muscle originated from the supraglenoid tubercle

Answer 3

long head of the biceps brachii

Question 4

which head of the triceps originates from the humerus more superiorly

Answer 4

lateral head

Question 5

insertion of the triceps

Answer 5

olecranon of the ulna

Question 6

olecranon and coronoid processes are part of which bone

Answer 6

ulna

Question 7

action of triceps on elbow joint

Answer 7

extension

Question 8

action of triceps on shoulder

Answer 8

long head extends shoulder and prevents dislocation

Question 9

origin and insertion of the anconeus

Answer 9

lateral epicondyle of humerus to lateral side of olecranon and superior posterior part of the ulna

Question 10

innervation of the triceps

Answer 10

radial nerve (c6, C7, C8)

Question 11

cord origin of the radial nerve

Answer 11

posterior cord

Question 12

innervation of the anconeus

Answer 12

radial nerve (C7, C8, T1)

Question 13

roots of the radial nerve in brachial plexus

Answer 13

C5-T1

Question 14

true/false - radial nerve innervated extensor compartment of arm AND forearm

Answer 14

true - !all extensor muscles of the elbow and wrist joints!

Question 15

action of the anconeus on elbow joint

Answer 15

elbow extension and stabilisation

Question 16

what does the aconeus muscle do during pronation

Answer 16

it abducts the ulna

Question 17

branch of the brachial artery that accompanies the radial nerve in the radial groove of the humerus

Answer 17

profunda brachii

Question 18

what arm muscles are innervated by the radial artery

Answer 18

triceps and anconeus

Question 19

clinical sing of radial nerve damage

Answer 19

wrist drop