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MSK - anatomy - ABDN > Upper limb 3 > Flashcards

Flashcards in Upper limb 3 Deck (53):
1

what are the general actions of the muscles of the anterior forearm

flexion of the wrist, fingers and pronation of the forearm (all of the superficial muscles that are attached to the medial epicondyle)

2

which epicondyle are the superficial muscles of the anterior forearm attached to

the medial epicondyle (this is why they cause pronation of the forearm)

3

name the superficial muscles of the forearm

- flexor carpi ulnaris
- palmar is longus
- flexor carpi radialis
- pronator teres

4

what nerve innervates most of the muscles of the anterior forearm

the median nerve

5

what muscles in the forearm are not innervated by the median nerve and what is there innervation

- brachioradialis (radial nerve)
- flexor carpi ulnaris (ulnar nerve)
- the medial half of the flexor digitorum profundus (ulnar nerve)

6

what cords of the brachial plexus form the median nerve

the medial and the lateral

7

how does the median nerve enter the hand

via the carpal tunnel under the flexor retinaculum

8

what muscle of the anterior forearm is responsible for adducting the hand

flexor carpi ulnaris

9

what muscle of the anterior forearm is responsible for abducting the hand

flexor carpi radialis

10

name a superficial forearm muscle that is not attached to the medial epicondyle

the brachioradialis

11

what is the innervation of the brachioradialis

the radial nerve

12

what are the actions of the brachioradialis

supination of the forearm and flexion of the elbow joint

13

name the intermediate muscle of the forearm

flexor digitorum superficialis

14

what is the role of the flexor digitorum superficialis

flexion of the proximal inter-phalangeal joints

15

what is the innervation of the flexor digitorum superficialis

median nerve

16

what is the relation of the flexor digitorum superficialis to the flexor digitorum profundus

the FDP sits deep to the FDS

17

what is the innervation of the flexor digitorum profundus

the lateral half is innervated by the medial nerve and the medial half is innervated by the ulnar nerve

18

name the deep muscles of the anterior forearm

- flexor digitorum profundus
- pronator quadratus
- flexor pollicis longus

19

what are the actions of the flexor polices longus

flexion of the thumb

20

where are the flexor digitorum profundus and the flexor polices longus in relation to each other

the flexor digitorum profundus is found on the medial side and the flexor polices longus is found on the lateral side

21

in the cubital fossa, where does the median nerve lie in relation to the brachial artery

the median nerve sits superficially to the brachial artery

22

what is the flexor retinaculum

this is a fibrous band in the anterior forearm that covers the carpal tunnel

23

how does the ulnar nerve enter the forearm

between he heads of the flexor carpi ulnaris

24

which epicondyle of the humerus does the ulnar nerve pass over

the medial nerve

25

what are the actions of the flexor digitorum profundus

flexion of the hand and the fingers at both of the interphalangeal joints

26

what are the contents of the carpal tunnel

9 tendons (4 FDS, 4 FDP and the palmar is longus tendon) and 1 nerve (median nerve)

27

name the tendon that is continuous with the palmar apponeurosis

the palmaris longus tendon

28

what is is the role of the thenar muscles

movement of the thumb

29

name the 3 thenar muscles

- abductor policis brevis
- flexor policis brevis
- opponens policis

30

what is the innervation of the thenar muscles

the median nerve

31

what is the role of the abductor policus brevis

abducts the thumb

32

what is the role of the flexor policus brevis

flexes the thumb at the metacarpal-phalangeal joint

33

what is the role of the opponens pollicus

oppose the thumb towards the palm of the hand

34

name the 3 hypothenar muscles

- abductor digiti minimi
- flexor digiti minimi
- opponens digiti minimi

35

what is the innervation of the hypothenar muscles

the ulnar nerve

36

what cord of the brachial plexus gives off the ulnar nerve

the medial cord

37

name the muscle that adducts the thumb

adductor pollicis

38

what is the innervation of the adductor pollicis muscle

the ulnar nerve

39

where are the lumbrical muscles found in the hand

parallel to the metacarpal bones

40

what are the actions of the lumbrical muscles

they flex the fingers at the metacarpal phalangeal joints and they extend the fingers at the interphalangeal joints (make an L with the finger)

41

what is the innervation of the lumbrical muscles

the medial two are innervated by the ulnar nerve and the lateral two are innervated by the median nerve

42

where are the interossei muscles located

between the metacarpal bones - there are two sets, a palmar and dorsal set

43

what are the actions of the interossei muscles

the dorsal ones are responsible for abducting the fingers and the palmar ones are responsible for adducting the fingers

44

what innervates the interossei muscles

the ulnar nerve

45

what artery supplies the superficial palmar arch

the ulnar artery

46

what artery supplies the deep palmar arch

the radial artery

47

all of the muscles in the hand are innervated by the ulnar nerve expect what

the thenar muscles and the lateral 2 lumbrical muscles - these are innervated by the median nerve

48

what nerve innervates the section of skin over the thenar muscles

the radial nerve

49

what nerve innervates most of the skin on the dorsal of the hand

the radial nerve

50

what nerve innervates the majority of the skin on the palmar aspect of the hand

the median nerve

51

name the carpal bones

scaphoid, lunate, triquentrum, pisiform, trapezium, trapezoid, capitate and hamate

52

what type of joint is the wrist joint

synovial condyloid

53

what bones reticulate in the wrist joint

the scaphoid, lunate and the radius