Anatomy of Hand and Wrist

Question 1

Which nerve extends the wrist?

Answer 1

Radial nerve

Question 2

Name the bones of the hand (L, starting with S, going clockwise)?

Answer 2

Scaphoid
Trapezium
Trapezoid
Capitate
Hamate
Triquetrum
Pisiform
Lunate

Question 3

What type of joint is the distal radio-ulnar joint?

Answer 3

Synovial pivot

Question 4

What type of joint is the wrist joint?

Answer 4

Synovial condyloid

Question 5

What type of joint is the 1st carpo-metacarpal joint?

Answer 5

Synovial saddle

Question 6

What type of joint is the 2nd-5th carpo-metacarpal joint?

Answer 6

Synovial condyloid

Question 7

The ulnar artery is the main contributor to what vessel?

Answer 7

Superficial palmar arch

Question 8

The radial artery is the main contributor to what vessel?

Answer 8

Deep palmar arch

Question 9

Where does the subclavian artery become the axillary?

Answer 9

Lateral border of first rib

Question 10

Where does the axillary artery become the brachial?

Answer 10

Border of teres major

Question 11

What are the superficial veins of the upper limb?

Answer 11

Dorsal venous arch
Cephalic vein (lateral)
Basilic vein (medial)
Median cubital vein

Question 12

What is the lymphatic drainage of the arm?

Answer 12

Axillary lymph node

Question 13

What are the first layer of medial forearm muscles?

Answer 13

Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris

Question 14

What are the second layer of medial forearm muscles?

Answer 14

Flexor digitorum superficialis

Question 15

What are the third layer of medial forearm muscles?

Answer 15

Flexor pollicis longus
Flexor digitorum profundus
Pronator quadratus

Question 16

What muscles abduct the wrist?

Answer 16

Flexor carpi radialis
Extensor carpi radialis longus
Extensor carpi radialis brevis

Question 17

What muscles adduct the wrist?

Answer 17

Flexor carpi ulnaris

Extensor carpi ulnaris

Question 18

What muscle pronate the wrist?

Answer 18

Pronator teres

Pronator quadratus

Question 19

Flexor digitorum superficialis attaches to what?

Answer 19

Middle phalanges of digits 2-5

Question 20

Flexor digitorum profundus attaches to what?

Answer 20

Distal phalanges

Question 21

Flexor pollicis longus attaches to what?

Answer 21

Distal phalange

Question 22

What are the functions of the posterior forearm muscles?

Answer 22

Extensors of wrist/digits
Adduct
Abduct
Supinate

Question 23

Which muscles supinate the wrist?

Answer 23

Biceps brachii

Supinator

Question 24

What sheath sits over the extensor tendons of the wrists?

Answer 24

Extensor retinaculum

Question 25

What sheath sits over the flexor tendons of the wrist?

Answer 25

Flexor retinaculum

Question 26

What structure sits in the anotomical snuff box?

Answer 26

Radial artery

Question 27

What is the innervation of the flexors of the arm?

Answer 27

Musculocutaneous nerve

Question 28

What is the innervation of the extensors of the arm?

Answer 28

Radial nerve

Question 29

What is the innervation of the flexors of the forearm?

Answer 29

Median nerve Ulnar nerve (brachioradialis - Radial nerve)

Question 30

What is the innervation of the extensors of the forearm?

Answer 30

Radial nerve

Question 31

What is the innervation of brachioradialis?

Answer 31

Radial nerve

Question 32

What are the muscle groups of the hand?

Answer 32

``` Thenar (4) Hypothenar (3) Lumbricals (4) Palmar interossei (3) Dorsal interossei (4) ```

Question 33

What is the innervation of the thenar muscles?

Answer 33

Median nerve (except adductor pollicis (Ulnar nerve))

Question 34

What is the innervation of the hypothenar muscles?

Answer 34

Ulnar nerve

Question 35

What is the innervation of the Lumbricals 1-2?

Answer 35

Median nerve

Question 36

What is the innervation of the Lumbricals 3-4?

Answer 36

Ulnar nerve

Question 37

What is the innervation of the dorsal interossei?

Answer 37

Ulnar nerve

Question 38

What is the innervation of the palmar interossei?

Answer 38

Ulnar nerve

Question 39

Ulnar nerve innervates what structures in the hand?

Answer 39

Hypothenar muscles Lumbricals 3-4 Dorsal/palmar interossei Adductor pollicis

Question 40

Median nerve innervates what structures in the hand?

Answer 40

Thenar muscles | Lumbricals 1-2

Question 41

What are the thenar muscles innervated by Median nerve

Answer 41

Abductor pollicis brevis Flexor pollicis brevis Opponens pollicis brevis

Question 42

What are the thenar muscles innervated by ulnar nerve?

Answer 42

Adductor pollicis

Question 43

What are the hypothenar muscles?

Answer 43

Flexor digiti minimi Abductor digiti minimi Opponens digiti minimi

Question 44

What are the functions of the interossei muscles?

Answer 44

PAD DAB Palmar Adduct Dorsal Abduct (the fingers)

Question 45

Where do the lumbricals originate?

Answer 45

Tendons of flexor digitorum profundus

Question 46

What is the action of the lumbricals?

Answer 46

Flex MCP joint | Extend PIP joint

Question 47

Median nerve injury presents how in the hand?

Answer 47

Inability to flex distal IP joint of index finger | Inability to flex digits 2, 3 into a fist