Movements of the Hand Flashcards Preview

Locomotor > Movements of the Hand > Flashcards

Flashcards in Movements of the Hand Deck (37):
1

What are the main 2 carpal bones?

Scaphoid and lunate

2

What makes up the radio-carpal joint

scaphoid lunate and radius all articulating

3

How many carpals do you have?

7

4

What joint is the knuckles?

MCP

5

What movement occurs at the MCP?

flexion extension abduction addiction

6

What joints do you have in the phalanges?

PIP AND DIP

7

What movements occur at the PIP and DIP

flexion and extension

8

What joints are in the thumb?

1 MCP and 1 interphalangeal

9

what does the MCP in the thumb allow

flexion and extension

10

What is the difference between extension of the thumb and abduction?

Abduction thumb goes at right angle towards you but extension goes out laterally

11

What is opposition a combination of?

Flexion abduction and medial rotation

12

What is opposition used for?

Precision and power grips

13

Where do the muscles that move the fingers originate?

intrinsic muscles in hand and extrinsic in forearm

14

where do the flexor and extensor muscles of the digits pass over

the wrist, extrinsic muscles, with tendons going into hand

15

what are the movements in the anterior compartment of the forearm

flexor pronator

16

what are the movements of the posterior compartment in the forearm

extensor suppinator

17

Where do muscles attach on to in the humerus

flexors attach to medial epicondyle whilst extensors attach to lateral epicondyle

18

What are your 4 superficial flexors attaching to the medial epicondyle?

pronator teres
flexor Carpi radialis
palmaris longus
flexor Carpi ulnaris

+ brachioradiis (technically posterior compartment as supplied by radial nerve)

19

what are your flexor muscles which close the hand

deeper flexor muscles
flexor digitorum superficialis

flexor policis longus
flexor digitorum profoundus

20

why do the tendons in the carpal region need to be protected by synovial sheath?

tendons run over carpal region and could rub against them

21

how does a ganglion cyst form

Tendon sheath years so synovial fluid leaks out, plasma can be taken up by lymphatics but GAG end up in cyst

22

what are the tendons of the FFS and FDP covered by and what does this split into?

tendon sheath deep to flexor retinaculum, separate into digital synovial sheaths

23

What is the carpal tunnel? what goes through it?

tunnel formed by carpals at wrist, flexor tendon passes through, flexor retinaculum keeps them in place, 9 tendons pass through, medial nerve passed through innervating flexor muscles under retinaculum to get to muscles at base of thumb and 1st 3 and a half digits on palmar side

24

what joint does the FDS flex?

MCP PIP

25

What does the FDP flex?

MCP PIP DIP

26

what does the flexor policis longus flex

MCP and IP of the thumb

27

What muscles do the intrinsic muscles act on and to do what

close hand, act on thumb - thenar muscles and little finger hypothenar muscles

28

What connects the FDS and the FDP

vincula tendinous strands

29

What is the cause of trigger finger

tendons of FDS and FDP enlarge proximal to tendon sheath so unable to move finger

30

what are the symptoms of trigger finger

unable to extent finger, if extends passively, snap is audible as tendon moves into sheath

31

Which muscles open the hand

extensor muscles

extensor digitorum communis
extensor indicis
extensor digiti minimi

32

What are the extrinsic muscles of the hand? What do they act on

thenar muscles acting on thumb
hypothenar muscles acting on little finger

33

What are the thenar muscles?

A OF A OF A

Abductor policis brevis
opponens pollicis
flexor pollicis brevis

34

What are the hypothenar muscles

A OF A OF A

adductor pollicis
opponens pollicis
abductor pollicis brevis
flexor pollicis brevis

35

What are the compartments of the hand?

hypothenar
thenar
central
adductor
interosseous

36

What are the potential spaces in the hand

mid palmar and thenar bounded by fibrous muscle septa

37

What is the cause of dupuyten's contracture

fixed flexion contracture of the hand
palmar fascia thickens and collagen type 1 changes to type 3
liver cirrhosis
over 40
family history
men
Northern European