The forearm, wrist, and hand 2

Question 1

The innervation of the hand is provided by the

Answer 1

Median and ulnar nerves

Question 2

The primary motor nerve to the intrinsic hand muscles

Answer 2

Ulnar nerve

Question 3

The primary sensory nerve to the palmar hand

Answer 3

Median nerve

Question 4

The eight carpal bones are arranged in two rows of four. In the proximal row, the scaphoid and lunate bones articulate with the

Answer 4

Distal radius

Question 5

Lies within the tendon of the flexor carpi ulnaris muscle

Answer 5

Pisiform bone

Question 6

The eight carpal bones are arranged in two rows of four. In the distal row, the trapezium articulates with the

Answer 6

Thumb metacarpal

Question 7

In the distal row, the ulnar nerve and artery pass lateral to the

Answer 7

Hook of the hamate bone

Question 8

The hand bones include 5 metacarpel bones and

Answer 8

14 phalanges (finger bones)

Question 9

The only finger with 2 phalanges instead of three

Answer 9

Thumb

Question 10

What are three joints of the hand?

Answer 10

1. ) Thumb carpometacarpel
2. ) Metacarpophalangeal (MCP)
3. ) Interphalangeal

Question 11

The metacarpal bones articulate with the proximal phalanges of the digits forming the

Answer 11

“Knuckles” of the hand

Question 12

The articulation of the proximal and middle phalanges

Answer 12

Proximal interphalangeal joint (PIP)

Question 13

The articulation between the middle and distal phalanges

Answer 13

Distal interphalangeal joint (DIP)

Question 14

What are the movements seen at the thumb carpometacarpel joint?

Answer 14

Flexion/extension, abduction/adduction, and opposition/reposition

Question 15

What are the movements seen at the metacarpophalangeal (MCP) joints?

Answer 15

Flexion/extension, abduction/adduction, and circumduction

Question 16

What are the movements seen at the interphalangeal joints?

Answer 16

Flexion/extension

Question 17

The fascia of the wrist and hand greatly facilitates

Answer 17

Hand function

Question 18

Protects the palmar surface and adheres to the skin improving grip

Answer 18

Palmar aponeurosis

Question 19

Prevents “bowstringing” of flexor tendons and forms the roof of the carpal tunnel

Answer 19

Flexor retinaculum

Question 20

The passageway for nine flexor tendons and the median nerve into the hand

Answer 20

The carpal tunnel

Question 21

Provide fine movement of the digits and occupy primarily the palmar aspect of the hand

Answer 21

Intrinsic hand muscles

Question 22

The intrinisic hand muscles can be compartmentalized into

Answer 22

1. ) Thenr muscles
2. ) Hypothenar muscles
3. ) Lumbricales and interossei muscles

Question 23

Muscles that move the thumb

Answer 23

Thenar muscles

Question 24

Muscles that move the small finger

Answer 24

Hypothenar muscles

Question 25

Muscles that move the digits

Answer 25

Lumbricales and interossei muscles

Question 26

What are the three muscles of the thenar eminence and what are their functions?

Answer 26

1. ) Pollicis brevis: Thumb flexion
2. ) Abductor pollicis brevis: Thumb ABduction
3. ) Opponens ollicis: Thumb opposition

Question 27

The muscles of the thenar eminence are innervated by the

Answer 27

Recurrent median nerve

Question 28

What are the three muscles of the hypothenar eminence and what are their functions?

Answer 28

1. ) Flexor digiti minimi: Small finger extension
2. ) Abductor digiti minimi: Small finger ABduction
3. ) Opponens digiti minimi: Small finger opposition

Question 29

The muscles of the hypothenar eminence are innervated by the

Answer 29

Deep ulnar nerve

Question 30

What are the 4 intrinsic muscles?

Answer 30

1. ) Adductor pollicis
2. ) Lumbrical
3. ) Dorsal interossei
4. ) Palmar interossei

Question 31

The adductor pollicis muscle function in

Answer 31

Thumb ADduction

Question 32

The Lumbrical muscle functions in

Answer 32

Flexion at MP and extension at IP

Question 33

The dorsal interossei muscle functions in

Answer 33

ABduction of digits 2-4

Question 34

The palmar interossei functions in

Answer 34

ADduction of digits 2, 3, and 5

Question 35

The intrinsic (lumbricale and interossei) muscles are innervated by the

Answer 35

Deep ulnar nerve for most

2 Radial lumbricals innervated by median nerve

Question 36

Supplies sensory innervation to the palmar surface of the skin covering the radial three and one-half digits and supplies motor innervation to 5 intrinsic hand muscles

Answer 36

Median nerve

Question 37

Which hand muscles does the median nerve supply?

Answer 37

2LOAF

2 radial Lumbricals
Opponens pollicis
Abductor Pollicis brevis
Flexor pollicis brevis

Question 38

Supplies sensory innervation to the palmar surface of the skin covering the ulnar one and one-half digits and supplies motor innervation to the remaining 13
intrinsic hand muscles

Answer 38

Ulnar nerve

Question 39

The radial and ulnar arteries anastomose forming palmar arterial arches. The superficial palmar arch is primarily

Answer 39

Ulnar artery

Question 40

The radial and ulnar arteries anastomose forming palmar arterial arches. The deep palmar arch is primarily

Answer 40

Radial artery

Question 41

Fracture that most commonly results from a fall on an outstretched extended hand

Answer 41

Colles’ Fracture

Question 42

Dorsal view shows a radial deviation of hand with ulnar prominance of styloid process

Answer 42

Colles’ fracture

Question 43

Usually caused by fall on outsretched hand with impact on thenar eminance

Answer 43

Scaphoid Fracture

Question 44

When dealing with forearm muscles, if a muscle crosses more than one joint, its primary action is at the

Answer 44

Distal-most joint it crosses

Question 45

Carpel tunnel syndrome is the result of

Answer 45

Inflammation in the carpel tunnel that causes median nerve compression

Question 46

Which spinal nerves are responisble for the motor function of the hand?

Answer 46

C8 and T1

Question 47

Which spinal nerves are responsible for the sensory function of the hand?

Answer 47

C6, C7, C8

Question 48

Which digits receive sensory innervation from the Ulnar nerve?

Answer 48

Ulnar 1.5 digits

Question 49

Which digits receive sensory innervation from the Median nerve?

Answer 49

Radial 3.5 digits