Upper limb dry room

Question 1

what are the 3 common sites of humerus fractures and what nerves would this damage?

Answer 1

surgical neck - axillary nerve
radial groove - radial nerve
medial epicondyle - ulnar nerve

Question 2

what vein is often used for IV injections?

Answer 2

median cubital vein

Question 3

what artery is found in the cubital fossa?

Answer 3

brachial artery

Question 4

what are the contents of the cubital fossa?

Answer 4

radial nerve
biceps tendons
brachial artery
median nerve

Question 5

what does the triceps tendon attach to distally?

Answer 5

olecranon process of humerus

Question 6

what artery runs along side the radial nerve in the radial groove?

Answer 6

profunda femoris artery

branch of the brachial artery

Question 7

what nerve innervates the triceps?

Answer 7

radial nerve

Question 8

what nerve innervates the biceps?

Answer 8

muculocutaneous

Question 9

what nerve innervates the coracobrachialis?

Answer 9

muculocutaneous

Question 10

what nerve innervates the brachial muscle?

Answer 10

muculocutaneous

Question 11

what muscle does the musculocutaneous nerve pierce?

Answer 11

coracobrachialis

Question 12

what nerve would be damaged if there was a mid haft humeral fracture and what consequence would this cause?

Answer 12

damage to radial nerve in the radial groove

would affect the extensor muscles of the arm i.e. triceps

Question 13

what is wrist drop a sign of?

Answer 13

radial nerve damage as it supplies the extensor muscles of the arm (triceps), wrist and hand

Question 14

what is the clinical sign of radial nerve damage?

Answer 14

wrist drop

Question 15

apart from a mid-shaft humeral fracture, what could be another cause of wrist drop?

Answer 15

lead poisoning due to the damage it causes to the radial nerve

Question 16

what are the ligaments at the elbow joint?

Answer 16

radial collateral ligament
ulnar collateral ligament
annular ligament of radius

Question 17

what muscles extend the elbow?

Answer 17

triceps

anconeus

Question 18

what muscles flex the elbow?

Answer 18

biceps brachii
brachioradialis
brachialis

Question 19

what type of joins are the proximal and distal radioulnar joints?

Answer 19

synovial pivot

Question 20

a knife injury into the axilla could injure what nerve? what consequence could this have?

Answer 20

musculocutaneous nevre

paralysis of the muscles of the arm and loss of sensation to the forearm

Question 21

what is the root value of the musculocutaneous nerve and from what cord does it arise?

Answer 21

C5, C6, C7

lateral cord

Question 22

what is the root value of the radial nerve and from what cord does it arise?

Answer 22

C5, C6, C7, C8, T1

posterior cord

Question 23

what is the root value of the median nerve and from what cord does it arise?

Answer 23

C5, C6, C8, T1

medial and lateral cords

Question 24

what is the root value of the ulnar nerve and from what cord does it arise?

Answer 24

C8, T1

medial cord

Question 25

what is the nerve supply of the coracobrachialis muscle?

Answer 25

C5, C6, C7 via musculocuatneous | main is C6

Question 26

what is the nerve supply of the brachial muscle?

Answer 26

C5, C6, C7 via msuculocutaneous | main is C6

Question 27

what is the nerve supply of the biceps muscle ?

Answer 27

C5, C6 via musculocuatneous | main is C6

Question 28

what is the function of the coracoacromial ligament?

Answer 28

prevents upper displacement of the humeral head

Question 29

what ligament prevents upper displacement of the humeral head?

Answer 29

coracoacromial ligament