Anatomy of the Hand and Wrist

Question 1

movement at shoulder

Answer 1

flexion
extension
adduction
abduction
circumduction

Question 2

movement at elbow

Answer 2

flexion

extension

Question 3

movement at prox and distal radio-ulnar

Answer 3

pronation

supination

Question 4

movement at wrist

Answer 4

flexion
extension
adduction
abduction
circumduction

Question 5

movement at 1st CMC

Answer 5

flexion
extensiion
adduction
abduction
circumduction
opposition

Question 6

movement at 2-5th CMC

Answer 6

flexion, extension (4-5)
almost none (2-3)

Question 7

movement at PMCP

Answer 7

flexion
extension
adduction
abduction
circumduction

Question 8

movement at IPJ

Answer 8

flexion

extension

Question 9

where does the subclavian a become the axillary a?

Answer 9

lat border of 1st rib

Question 10

where does axillary a bcome brachial a?

Answer 10

inferior border of teres major

Question 11

where does the brachial artery divid?

Answer 11

cubital fossa

Question 12

what arch does the ulnar artery give?

Answer 12

superficial

Question 13

what arch does the radial artery give?

Answer 13

deep

Question 14

describe the venous drainage of the arm

Answer 14

The superficial veins arise from the dorsal venous arch on the back of the hand. The cephalic vein travels up the limb on the lateral side. It drains into the axillary vein below the clavicle. The basilic vein travels up the limb on the medial side to become continuous with the brachial veins (deep veins accompanying brachial artery). The median cubital vein connects the cephalic and basilic veins across the cubital fossa.

Question 15

where do the tendons of FDS attach?

Answer 15

middle phalanges of digits 2-5

Question 16

name the ant forearm muscles

Answer 16

pronatar teres
FCR
palmaris longus
FCU

FDS

FDP
pronator quadratus

Question 17

what actions do the anterior forearm muscles have?

Answer 17

1. Flex the wrist
2. Adduct (FCU)
3. Abduct (FCR)
4. Pronation (PT, PQ, deep muscles)

Question 18

what do the post forearm muscle do?

Answer 18

1. Powerful extensor of the wrist and digits (fist clinchers)
2. Adduct (ECU)
3. Abduct (ECRL, ECRB)
4. Supination (Biceps brachii, supinator)

Question 19

name the post forearm muscles

Answer 19

brachioradialis
ECRL
ECRB
APL
EPB
ECU
anconeus
supinator
extensor indicis
EPL

EDM
ED

Question 20

name the tendons surrounding the anatomical snuffbox

Answer 20

APL
EPB
EPL
extensor indicis

Question 21

innervation of thenar muscles

Answer 21

median (adductor pollicis - ulnar)

Question 22

innervation of hypothenar muscles

Answer 22

ulnar

Question 23

innervation of lumbricals 1-2

Answer 23

median

Question 24

innervation of lumbricals 3-4

Answer 24

ulnar

Question 25

innervation of dorsal interossei

Answer 25

ulnar

Question 26

innervation of palmar interossei

Answer 26

ulnar

Question 27

lumbricals: origin, action

Answer 27

FDP tendons | flex MCP and extend PIP

Question 28

innervation of anterior arm muscles (BBC)

Answer 28

musculocutaneous

Question 29

innervation of triceps

Answer 29

radial

Question 30

innervation of FCU (sup ant)

Answer 30

ulnar

Question 31

innervation of palmaris longus, FCR, PT (sup ant)

Answer 31

median

Question 32

innervation of FDS (int ant)

Answer 32

median

Question 33

innervation of FDP (deep ant)

Answer 33

medial half - ulnar | lateral half- ant interosseus branch of median

Question 34

innervation of FPL, PQ (deep ant)

Answer 34

median - ant interosseus

Question 35

innervation of bachioradialis, ECRL+B, ECU, aconeus (sup post)

Answer 35

radial

Question 36

innervation of EDM, ED

Answer 36

deep branch of radial

Question 37

innervation of supinator (deep post)

Answer 37

deep radial

Question 38

innervation of APL, EPB, EPL, extensor indices (deep post)

Answer 38

posterior interosseus branch of radial

Question 39

describe the blood supply of the scaphoid

Answer 39

The scaphoid has a retrograde blood supply (i.e. from distal to proximal). A fracture of scaphoid is therefore more difficult to heal and there is a risk of avascular necrosis in the proximal part. The more proximal the fracture the likely that AVN will develop.

Question 40

contents of anatomical snuffbox

Answer 40

``` radial artery radial styloid process schaphoid trapezium base of 1st metacarpal ```

Question 41

extensors of the wrist

Answer 41

1. EPB and APL 2. ECRL and ECRB 3. EPL 4. Extensor digitorum communis and extensor indicis 5. EDM 6. ECU