Ch.7 Wrist & Hand Joints

Question 1

How many joints involve hand and wrist

Answer 1

More than 25

Question 2

How many bones make up the wrist and hands?

Answer 2

29

Question 3

What are the 29 bones?

Answer 3

• Radius and ulna
• 8 carpal bones
• 5 metacarpal bones
• 14 phalanges

Question 4

Proximal row of carpal bones from radius to ulna side

Answer 4

• Scaphoid (boat-shaped/navicular)
• Lunate (moon-shaped)
• Triquetrum (three-cornered)
• Pisiform (pea-shaped)

Question 5

Distal row of carpal bones from radius to ulna side

Answer 5

• Trapezium
• Trapezoid
• Capitate (head-shaped)
• Hamate (hooked)

Question 6

Most often injured or carpal bones

Answer 6

Scaphoid

Question 7

What fingers have 3 phalanges each?

Answer 7

Index, middle, ring finger

Question 8

Bony landmarks of the humerus and the ulna

Answer 8

Humerus
• Medial epicondyle
• Lateral epicondyle
Ulna
• Coronoid process

Question 9

Movement of radiocarpal joint

Answer 9

Flexion, extension, abduction, and adduction

Question 10

The 3 joints in each finger

Answer 10

• Metacarpophalangeal (MCP)
joints
• Proximal interphalangeal (PIP)
joints
• Distal interphalangeal (DIP) joints

Question 11

2 thumb joints and one of thumb

Answer 11

• Metacarpophalangeal (MCP)
joint
• Interphalangeal (IP) joint
• Carpometacarpal (CMC) joint of
thumb

Question 12

Most common joint in the
body for osteoarthritis

Answer 12

Carpometacarpal (CMC) joint
of thumb

Question 13

Movements of Carpometacarpal (CMC) joint of thumb

Answer 13

Abduction, adduction, flexion,
extension

Question 14

Wrist movement: Movement of palm of hand toward anterior (volar) aspect of forearm

Answer 14

Flexion of wrist

Question 15

Wrist movement: Movement of back of hand toward posterior (dorsal) aspect of forearm

Answer 15

Extension of wrist

Question 16

Wrist movements: Movement of thumb side of hand toward lateral aspect or radial side of forearm
• Radial flexion

Answer 16

Abduction of wrist

Question 17

Wrist movements: Movement of little finger side of hand toward medial aspect or
ulnar side of forearm
• Ulnar flexion

Answer 17

Adduction of wrist

Question 18

Finger movements: Movement of the thumb across the palmar aspect

Answer 18

Opposition

Question 19

Wrist movements: Movement of the thumb as it returns to anatomical position from opposition

Answer 19

Reposition

Question 20

What nerves branches from the brachial plexus innervate wrist and hand muscles?

Answer 20

Radial, median, ulnar branch

Question 21

T/F carpal tunnel syndrome is preventable

Answer 21

True

Question 22

What are the 3 extrinsic wrist flexors

Answer 22

o Flexor carpi radialis
o Flexor carpi ulnaris
o Palmaris longus

Question 23

What are the three extrinsic wrist extensors

Answer 23

o Extensor carpi radialis longus
o Extensor carpi radialis brevis
o Extensor carpi ulnaris

Question 24

Phalangeal flexors

Answer 24

o Flexor digitorum superficialis
o Flexor digitorum profundus
o Flexor pollicis longus

Question 25

Phalangeal extensors

Answer 25

o Extensor digitorum o Extensor indicis o Extensor digiti minimi o Extensor pollicis longus o Extensor pollicis brevis

Question 26

Phalangeal abductor of thumb and wrist

Answer 26

Abductor pollicis longus

Question 27

O&I Flexor carpi radialis

Answer 27

• O: humerus • I: 2nd and 3rd metacarpal

Question 28

O&I flexor carpi ulnaris muscle

Answer 28

• O: humerus and ulna • I: palmar wrist

Question 29

O&I Palmaris longus muscle

Answer 29

• O: humerus • I: palmar aponeurosis

Question 30

O&I Extensor carpi ulnaris muscle

Answer 30

• O: humerus and ulna • I: 5th metacarpal

Question 31

O&I Extensor carpi radialis brevis muscle

Answer 31

• O: humerus • I: 3rd metacarpal

Question 32

OI EXTENSOR CARPI RADIALIS LONGUS MUSCLE

Answer 32

• O: humerus • I: 2nd metacarpal

Question 33

OI FLEXOR DIGITORUM SUPERFICIALIS MUSCLE

Answer 33

• O: humerus, ulna, radius • I: phalanges

Question 34

Largest extrinsic flexor

Answer 34

FLEXOR DIGITORUM SUPERFICIALIS MUSCLE

Question 35

OI FLEXOR DIGITORUM PROFUNDUS MUSCLE

Answer 35

• O: ulna • I: phalanges

Question 36

OI FLEXOR POLLICIS LONGUS MUSCLE

Answer 36

• O: radius, ulna • I: thumb

Question 37

Weakest extension of elbow

Answer 37

EXTENSOR DIGITORUM MUSCLE

Question 38

OI EXTENSOR DIGITORUM MUSCLE

Answer 38

• O: humerus • I: phalanges

Question 39

OI EXTENSOR INDICIS MUSCLE

Answer 39

• O: ulna • I: phalanges

Question 40

OI EXTENSOR DIGITI MINIMI MUSCLE

Answer 40

• O: humerus • I: phalanges

Question 41

OI EXTENSOR POLLICIS LONGUS MUSCLE

Answer 41

• O: ulna • I: thumb

Question 42

OI EXTENSOR POLLICIS BREVIS MUSCLE

Answer 42

O: radius I:Thumb

Question 43

OI ABDUCTOR POLLICIS LONGUS MUSCLE

Answer 43

• O: radius and ulna • I: thumb

Question 44

muscular pad on palmar surface of 1st metacarpal

Answer 44

Thenar eminence

Question 45

muscular pad that forms ulnar border on palmar surface

Answer 45

Hypothenar eminence

Question 46

Three intermediate muscles

Answer 46

• Three palmar interossei • Four dorsal interossei • Four lumbrical muscles

Question 47

Wrist flexion agonists

Answer 47

• Flexor carpi radialis • Flexor carpi ulnaris • Palmaris longus • Flexor digitorum superficialis • Flexor digitorum profundus • Flexor pollicis longus

Question 48

Wrist extension agonists

Answer 48

• Extensor carpi radialis longus • Extensor carpi radialis brevis • Extensor carpi ulnaris • Extensor digitorum • Extensor indicis • Extensor digiti minimi • Extensor pollicis longus • Extensor pollicis brevis

Question 49

Wrist abduction agonists

Answer 49

• Flexor carpi radialis • Extensor carpi radialis longus • Extensor carpi radialis brevis • Abductor pollicis longus • Extensor pollicis longus • Extensor pollicis brevis

Question 50

Wrist adduction agonists

Answer 50

• Flexor carpi ulnaris • Extensor carpi ulnaris

Question 51

Phalangeal flexion agonists

Answer 51

• Flexor digitorum superficialis • Flexor digitorum profundus • Flexor pollicis longus

Question 52

Phalangeal extension agonists

Answer 52

• Extensor digitorum • Extensor indicis • Extensor digiti minimi • Extensor pollicis longus • Extensor pollicis brevis