Upper Limb

Question 1

What do the posterior fibres of the deltoid do?

Answer 1

extension of shoulder

Question 2

What do the middle fibres of the deltoid do?

Answer 2

abduction of shoulder

Question 3

What do the anterior fibres of the deltoid do?

Answer 3

flexion of the shoulder

Question 4

What is the function of the biceps?

Answer 4

flexor of elbow

flexor of shoulder (weak)

Question 5

What nerve is the biceps supplied by?

Answer 5

musculocutaenous

Question 6

Where is the triceps muscle and how many heads does it have?

Answer 6

posterior compartment of arm

3 heads

Question 7

What is the function of the triceps?

Answer 7

extensor of elbow

extensor of shoulder (weak)

Question 8

What nerve supplies the triceps?

Answer 8

radial

Question 9

What do other muscles of the anterior compartment of the arm do and what nerve supplies them?

Answer 9

flexors/pronators

most supplied by median nerve, some by ulnar

Question 10

What do other muscles of the posterior compartment of the arm do and what nerve supplies them?

Answer 10

extensors/supinators

ALL supplied by radial nerve

Question 11

What is the first group of muscles in the hand?

Answer 11

forearm muscles

muscles bellies are in the compartments of forearm

Question 12

What is the second group of muscles in hand?

Answer 12

intrinsic muscles

muscle bellies are in hand in itself, as are tendon insertions

Question 13

How many rotator cuff muscles are there?

Answer 13

4

Question 14

Which rotator cuff muscles are seen posteriorly?

Answer 14

Supraspinatous
Infraspinatous
Teres minor

Question 15

Which rotator cuff muscle is seen anteriorly?

Answer 15

Subscapularis

Question 16

What fibres do named nerves of the brachial plexus carry?

Answer 16

• somatic motor fibres to skeletal muscles
• somatic sensory fibres from skin of upper limb
• sympathetic nerve fibres to smooth muscle of arterioles in upper limb (all), erector pili muscles (hair follicles), sweat glands