MSK cadavers upper limb

Question 1

Answer 1

Question 2

What is the common flexor origin in the forearm for superficial & intermediate flexors

Answer 2

medial epicondyl of humerus

Question 3

what is the innervation of the superficial flexors

Answer 3

the superficial flexors are innervated by the median nerve (FCR, palmaris longud and pronator teres), apart from flexor carpi ulnaris- ulnar nerve

Question 4

muscle in the intermediate flexor compartment of forearm & its innervation

Answer 4

flexor digitorum superficialis

Median nerve

Question 5

Answer 5

A. Flexor carpi ulnaris

B. Palmaris longus

C. Flexor carpi radialis

D. Pronator teres

Question 6

Action & innervation of brachioradialis

Answer 6

Flexion of the elbow

Innervation = radial nerve

Question 7

label deep group of anterior forearm muscles & their innervation

Answer 7

FDP- lateral half= median n

medial half= ulnar n

FPL- median n

Pronator quadratus- median n

Question 8

inserion and origin for FDS and FDP

Answer 8

FDS=Palmar surfaces of middle phalanges of medial 4 digits

FDP= Palmar surface of distal phalanges of medial 4 digits

Question 9

neurovascular structures of the forearm

Answer 9

Question 10

Describe Allens test

Answer 10

To determine the patency of the arteries in the distal forearm (prior to sampling of arterial blood, or insertion of arterial lines), Allen’s test is used.

The reason that this is performed is because in some individuals a unilateral circulation exists in the distal forearm. Therefore, if any cannulation is performed there is a risk of causing ischaemia (due to reduced blood flow) to the hand

Question 11

Contens of the anticubital fossa from lateral to medial

Answer 11

Radial nerve, Brachial tendon, Brachial artery, Median nerve

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Question 12

What 4 carpal bones does the flecor retinaculum anchor to

Answer 12

scaphoid, trapezium, hamate and pisiform

Question 13

Name the contents of the carpal tunnel & label diagram

Answer 13

Contents of Carpal Tunnel

4 tendons of flexor digitorum profundus

4 tendons of flexor digitorum superficialis

1 tendon of flexor pollicis longus

Median Nerve

Question 14

Answer 14

Question 15

what are the four mucles in the deep part of the central component of the palm

Answer 15

1. Flexor digitorum superficialis
2. Flexor digitorum profundus
3. Flexor tendon sheaths: flexor pollicus longus
4. lumbricles

Question 16

what is the function of the lumbricals

Answer 16

flex the fingers at the metacarpophalangeal joints and extend the interphalangeal joint of 2nd to 5th digits.

• bend a straightened finger

Question 17

what do the lumbricals arise from

Answer 17

Medial and lateral aspects of the FDP tendon, between the 1st to 5th metacarpals

Question 18

label this diagram

Answer 18

Question 19

Answer 19

Question 20

Answer 20

Question 21

Answer 21

Question 22

Answer 22

Question 23

label these

Answer 23

Question 24

Answer 24

Question 25

what type of joint is the proximal and dstil radio-ulnar joint

Answer 25

Question 26

what carpal bones does the radius articulate with

Answer 26

scaphoid and lunate bones

Question 27

Answer 27

A. ulna b. lunate c. triqetrum d. hamate e. capitate f. trapezoid g. trapezium

Question 28

label posterior compartment

Answer 28

Question 29

Answer 29

Question 30

label these two nerves

Answer 30

Question 31

what is the function of the Posterior interosseous nerve

Answer 31

main motor supply of the posterior forearm muscles- deep branch of the radial nerve

Question 32

where does the superficial branch of the radial nerve run?

Answer 32

As it branches at the cubital fossa it runs deep to brachioradialis and enters the hand passing over the anatomical snuff box It is purely sensory and distributed to skin on the dorsum of the hand.

Question 33

label anatomical snuff box

Answer 33

Question 34

what four muscles attach onto the dorsal digital expansion + label the diagram

Answer 34

1. Lumbricals of the hand 2. dorsal interossei muscles 3. Palmar interossei muscles 4. Extensor indicis muscle

Question 35

Complete the diagram

Answer 35

Question 36

Complete diagram

Answer 36

a) Abductor pollicis brevis b) Opponens pollicis c) Ulnar artery d) Ulnar nerve e) Flexor carpi ulnaris f) Palmaris longus g) Flexor carpi radialis

Question 37

Complete diagram

Answer 37

Question 38

Complete diagram

Answer 38

Question 39

Complete the blanks

Answer 39

Question 40

Complete the diagram

Answer 40

Question 41

Fill in the blanks

Answer 41

Question 42

Fill in the blanks

Answer 42

Question 43

Complete the diagram

Answer 43

Question 44

Complete the diagram

Answer 44

Question 45

Complete the diagram

Answer 45

Question 46

Complete the diagram

Answer 46

Question 47

Complete the diagram

Answer 47

Question 48

Complete the diagram

Answer 48

Question 49

Complete the diagram

Answer 49

Question 50

Complete the diagram

Answer 50

Question 51

Complete the diagram

Answer 51

Question 52

Complete the diagram

Answer 52

Question 53

Innervation of flexor digitorum profundus vs superficialis

Answer 53

FDP= Ulnar & median nerves FDS= median nerve

Question 54

Relationship of the ulnar nerve and ulnar artery

Answer 54

After passing posterior to the medial epicondyle of the humerus the ulnar nerve enters the forearm by passing between the heads of flexor carpi ulnaris muscle. Both the ulnar nerve and ulnar artery descend close to each other down the medial aspect of the forearm. The ulnar nerve lies medially to the ulnar artery at the level of the wrist