Upper Limb 3

Question 1

What are the superficial muscles of the forearm?

Answer 1

Pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris

Question 2

What are the actions of the pronator teres?

Answer 2

pronates and flexes forearm

Question 3

What supplies the pronator teres?

Answer 3

median nerve

Question 4

What are the actions of the flexor carpi radialis?

Answer 4

flexes and abducts wrist

Question 5

What supplies the flexor carpi radialis?

Answer 5

median nerve

Question 6

What are the actions of the flexor carpi ulnaris?

Answer 6

flexes and adducts wrist

Question 7

What is the action of the palmaris longus?

Answer 7

flexes wrist

Question 8

What supplies the palmaris longus?

Answer 8

median nerve

Question 9

What supplies the flexor carpi ulnaris?

Answer 9

ulnar nerve

Question 10

What are the actions of the flexor digitorum superficialis?

Answer 10

Flexes wrist and MCP & proximal IP joints of middle 4 digits

Question 11

What are the deep muscles of the forearm?

Answer 11

flexor digitorum profundus, flexor pollicus longus and pronator quadratus

Question 12

What are the actions of the flexor digitorum profundus?

Answer 12

flexes wrist and distal IP joints middle 4 digits

Question 13

What supplies the flexor digitorum profundus?

Answer 13

median nerve supplies digits 2&3, ulnar nerve supplies digits 4&5

Question 14

What is the action of the flexor pollicus longus?

Answer 14

flexes thumb (across hand)

Question 15

What supplies the flexor pollicus longus?

Answer 15

median nerve

Question 16

What is the action of the pronator quadratus?

Answer 16

pronates forearm

Question 17

What supplies the pronator qudratus?

Answer 17

median nerve

Question 18

How does the median nerve lie compared to the brachial artery in the cubital fossa?

Answer 18

lies medial to the artery

Question 19

Which muscles of the forearm does the median nerve NOT supply? What supplies these muscles?

Answer 19

Does not supply flexor carpi ulnaris and medial half of flexor digitorum profundus- they are supplied by ulnar nerve

Question 20

What are the 2 terminal branches oft the brachial artery? Where does this divide occur?

Answer 20

terminal branches are radial and ulnar arteries, this happens at the neck of the radius

Question 21

What is the roof of the carpal tunnel formed by?

Answer 21

fibrous retinaculum

Question 22

What are the contents of the carpal tunnel?

Answer 22

4 tendons of flexor digitorum superficialis, 4 tendons of flexor digitorum profundus, median nerve and 1 tendon of flexor pollicus longus

Question 23

What causes carpal tunnel syndrome? What are the symptoms?

Answer 23

results from a lesion that reduces the size of the carpal tunnel. Leads to tingling, decreased sensation and absence of tactile sensation in area supplied by median nerve

Question 24

What muscle is palmar aponeurosis a continuation of?

Answer 24

Palmaris longus

Question 25

What are the thenar muscles? Where are they located?

Answer 25

Aductor pollicus brevis, flexor pollicus brevis and opponens pollicis. Located on lateral part of the palm

Question 26

What is the supply to the thenar muscles?

Answer 26

Median nerve

Question 27

What are the hypothenar muscles? Where are they located?

Answer 27

Abductor digiti minimi, flexor digiti minimi, opponens digiti minimi. Located at medial side of palm.

Question 28

What supplies the hypothenar muscles?

Answer 28

Ulnar nerve

Question 29

What is the action of the adductor pollicus?

Answer 29

Adducts thumb

Question 30

What is the supply of the adductor pollicus?

Answer 30

Ulnar nerve

Question 31

What are the actions of the lumbricals?

Answer 31

flex fingers at MCP joints and extend fingers at IP joints of 2nd-5th fingers

Question 32

What are the lumbricals innervated by?

Answer 32

Medial 2 lumbriicals supplied by median nerve. Lateral 2 lumbricals supplied by ulnar nerve

Question 33

Where are the interossei located? How many are there?

Answer 33

Present between metacarpal bones. 4 dorsal and 3 palmar.

Question 34

What is the action of the dorsal interossei?

Answer 34

Abduction of the fingers (DAB)

Question 35

What is the action of the palmar interossei?

Answer 35

Adduction of the fingers (PAD)

Question 36

What are the interossei innervated by?

Answer 36

ulnar nerve

Question 37

What muscles in the hand does the ulnar nerve NOT supply? What are they supplied by?

Answer 37

does not supply the thenar muscles and 1st and 2nd lumbricals. They are supplied by median nerve.

Question 38

What are the 8 carpal bones in the wrist?

Answer 38

trapezium, scaphoid, lunate, triquetrum, pisiform, hamate, capitate, trapezoid

Question 39

What type of joint is the wrist joint? What bones articulate?

Answer 39

Synovial condyloid joint. Radius articulates with lunate and scaphoid.

Question 40

What movements can occur at the wrist joint?

Answer 40

flexion, extension, circumduction, adduction and abduction

Question 41

What are the actions of the extensor carpi radialis?

Answer 41

Extension and abduction of the wrist

Question 42

What can be seen on the dorsum of the hand when fingers are abducted?

Answer 42

tendons of extensor digitorum

Question 43

What bones can be felt in the anatomical snuff box? What artery lies on the floor of the box?

Answer 43

Scaphoid and trapezium can be felt. Radial artery lies on the floor.