L6: movement and muscles of the hand

Question 1

is there much movement between the bones of the wrist

Answer 1

No

Question 2

Carpal bones

Answer 2

Scaphoid 
lunate
Triquetrum 
pisiform 
hamate 
capitate 
trapezoid 
trapezium

Question 3

hamate fractures=

Answer 3

hook fractures

Question 4

lunate–>

Answer 4

dislocation

Question 5

scaphoid–>

Answer 5

fractures a lot

Question 6

finger abduction=

Answer 6

moving away from middle finger

Question 7

finger adduction=

Answer 7

moving towards the middle finger

Question 8

lifting the thumb up vertically =

Answer 8

abduction

Question 9

opposition=

Answer 9

pen holding grip

Question 10

what tendons do the lumbricals connect

Answer 10

the extensor tendons and the profundus tendons

Question 11

where do the lumbricals originate

Answer 11

flexor digitorum profundus

Question 12

where do the lumbricals insert

Answer 12

the extensor apparatus

Question 13

innervation of the radial 2 lumbricals

Answer 13

median nerve

Question 14

innervation of the ulnar 2 lumbricals

Answer 14

ulnar nerve

Question 15

function of the lumbricals

Answer 15

allows flexion of mp joints whilst keeping ip joints extended

Question 16

how many lumbricals

Answer 16

4

Question 17

which side are the lumbricals on

Answer 17

radial side of each digit

Question 18

2 main groups of hand muscles

Answer 18

thenar and hypothenar eminences

Question 19

what function do thenar muscles allow

Answer 19

abduction of the thumb

Question 20

thumb muscles=

Answer 20

thenar

Question 21

little finger muscles=

Answer 21

hypothenar

Question 22

through the wrist where does palmaris longus pass

Answer 22

over/ attached to the flexor retinaculum

Question 23

what is the palmaris longus aponeurosis important for

Answer 23

grip

Question 24

palmar aponeurosis=

Answer 24

extension of the palmaris longus tendon inserting into the base of the proximal phalanx

Question 25

nerves going to digits=

Answer 25

digital nerves

Question 26

muscles of the thenar eminence

Answer 26

flexor pollicis brevis
abductor pollicis brevis
opponens pollicis

Question 27

all muscles of the thenar eminence are innervated by

Answer 27

median nerve

Question 28

muscle deep to the thenar eminence=

Answer 28

adductor pollicis

Question 29

adductor pollicis=

Answer 29

double headed innervated by ulnar nerve

Question 30

nerve for abduction=

Answer 30

median nerve

Question 31

nerve for adduction=

Answer 31

ulnar nerve

Question 32

nerves for extension and flexion=

Answer 32

mixture of median, ulnar and some radial

Question 33

2 types of interosseous muscle

Answer 33

dorsal and palmar

Question 34

how many dorsal interosseous muscles

Answer 34

4

Question 35

dorsal interosseous origin

Answer 35

adjacent sides of metacarpals 2-5

Question 36

1st dorsal interosseous muscle comes from

Answer 36

ulna side of first metacarpal and radial side of the 2nd metacarpal

Question 37

muscle action of the dorsal interosseous muscles

Answer 37

• side to side movement of middle finger

- abduction of all other digits

Question 38

DAB=

Answer 38

dorsal interosseous abduction the digits

Question 39

how many palmar interosseous

Answer 39

3

Question 40

PAD=

Answer 40

palmar interosseous adduction the digits

Question 41

other functions of the interosseous muscles

Answer 41

• flex the metacarpophalangeal joint

- extend the interphalangeal joint

Question 42

what arch gives off the common palmar digital arteries

Answer 42

superficial palmar arch

Question 43

how many neurovascular bundles in the digits

Answer 43

2 on palmar side & 2 on dorsal side

Question 44

median nerve hand muscle supply=

Answer 44

half LOAF

Question 45

sensation supply of median nerve

Answer 45

• all the thumb
• all index finger
• all middle finger
• half ring finger
• most of the palm

Question 46

what sensation is still intact in carpal tunnel syndrome

Answer 46

very proximal palm is supplied by a branch of the median nerve before entering the carpal tunnel

Question 47

ulnar nerve muscle supply

Answer 47

all the rest of the hand

Question 48

deep branch ulnar nerve supplies motor to

Answer 48

• hypothenar
• lumbricals
• interosseous

Question 49

superficial branch ulnar nerve supplies motor to

Answer 49

-digital branches –> both sides of little finger and just ulna side of ring

Question 50

motor test for palmar interosseous (ulna nerve)

Answer 50

adduction –> holding paper between digits

Question 51

radial nerve supply in hand for motor

Answer 51

NONE

Question 52

sensory radial nerve in hand=

Answer 52

• 2 digital dorsal nerve to the index finger
• 1 dorsal digital branches to ring finger
• web space

Question 53

palmar digital nerve to the index finger comes from ____

Answer 53

median nerve