Dissection 13: Hand and Wrist

Question 1

is the palmaris longus an intrinsic or extrinsic muscle of the hand?

Answer 1

extrinsic

Question 2

what groups of wrist muscles are extrinsic in nature?

Answer 2

flexors
extensors
abductors
adductors

Question 3

long flexors and extensors of what digits are extrinsic muscles?

Answer 3

all

Question 4

are thumb adductors or abductors extrinsic in nature?

Answer 4

abductors

Question 5

is the palmaris brevis intrinsic or extrinsic?

Answer 5

intrinsic

Question 6

what does hypothenar mean?

Answer 6

regarding little finger

Question 7

what does thenar mean?

Answer 7

regarding thumb

Question 8

what do the interosseus muscles do?

Answer 8

abduction/adduction of fingers

Question 9

what do the lumbricals do?

Answer 9

flexion of MCP joints

extension of PIP joints

Question 10

name all the movements of the thumb

Answer 10

flexion
extension
abduction
adduction
opposition

Question 11

where does lymph from the hands drain to?

Answer 11

cubital

axillary

Question 12

what is another name for the antebrachial fascia?

Answer 12

deep fascia

Question 13

at what 2 points does the deep fascia of the anterior forearm thicken?

Answer 13

palmar carpal ligament

flexor retinaculum

Question 14

what does the flexor retinaculum attach to?

Answer 14

carpal bones

Question 15

what does the flexor retinaculum prevent?

Answer 15

bowstringing of tendons during flexion

Question 16

what is anterior to the carpal tunnel?

Answer 16

flexor retinaculum

Question 17

what is posterior to the carpal tunnel?

Answer 17

carpal bones

Question 18

what structures’ enter the palm via the carpal tunnel?

Answer 18

flexor digitorum superficialis
flexor digitorum profundus
flexor pollicis longus

Question 19

what nerve enters the palm via the carpal tunnel?

Answer 19

median

Question 20

why is sensation of the central palm spared in carpal tunnel?

Answer 20

palmar cutaneous branch of median nerve is given off proximal to the tunnel so escapes it

Question 21

what forms the superficial palmar arch?

Answer 21

superficial palmar branches of ulnar and radial arteries

Question 22

what forms the deep palmar arch?

Answer 22

deep palmar branches of ulnar and radial arteries

Question 23

name the 4 neurovascular bundles that supply each finger

Answer 23

medial palmar
lateral palmar
medial dorsal
lateral dorsal

Question 24

why is anaesthetic done around the finger?

Answer 24

to block all the nerves of the neurovascular bundles

Question 25

what does the radial nerve supply on the hand?

Answer 25

skin over base ofthumb

Question 26

name the only part of the palm that isnt covered by the median nerve and its innervation?

Answer 26

medial palm, ulnar

Question 27

what nerve innervates the medial digits from half of the ring finger onwards?

Answer 27

ulnar

Question 28

what nerve innervates the more lateral digits?

Answer 28

median

Question 29

tenderness in floor of the anatomical snuff box?

Answer 29

scaphoid fracture

Question 30

is the ulnar nerve’s sensory innervation the same as its motor?

Answer 30

yes

Question 31

radial nerve sensory innervation of the hand?

Answer 31

anatomical snuff box
proximal index and middle finger
lateral part of hand

Question 32

median nerve sensory innervation?

Answer 32

skin over distal thumb, index and middle finger

Question 33

way to remember the functions of the interossei?

Answer 33

PAD DAB
palmar adducts
dorsal abducts