The forearm, wrist, and hand 2 Flashcards Preview

Structure and Function Test 1 > The forearm, wrist, and hand 2 > Flashcards

Flashcards in The forearm, wrist, and hand 2 Deck (49):
1

The innervation of the hand is provided by the

Median and ulnar nerves

2

The primary motor nerve to the intrinsic hand muscles

Ulnar nerve

3

The primary sensory nerve to the palmar hand

Median nerve

4

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

Distal radius

5

Lies within the tendon of the flexor carpi ulnaris muscle

Pisiform bone

6

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

Thumb metacarpal

7

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

Hook of the hamate bone

8

The hand bones include 5 metacarpel bones and

14 phalanges (finger bones)

9

The only finger with 2 phalanges instead of three

Thumb

10

What are three joints of the hand?

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

11

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

"Knuckles" of the hand

12

The articulation of the proximal and middle phalanges

Proximal interphalangeal joint (PIP)

13

The articulation between the middle and distal phalanges

Distal interphalangeal joint (DIP)

14

What are the movements seen at the thumb carpometacarpel joint?

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

15

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

Flexion/extension, abduction/adduction, and circumduction

16

What are the movements seen at the interphalangeal joints?

Flexion/extension

17

The fascia of the wrist and hand greatly facilitates

Hand function

18

Protects the palmar surface and adheres to the skin improving grip

Palmar aponeurosis

19

Prevents "bowstringing" of flexor tendons and forms the roof of the carpal tunnel

Flexor retinaculum

20

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

The carpal tunnel

21

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

Intrinsic hand muscles

22

The intrinisic hand muscles can be compartmentalized into

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

23

Muscles that move the thumb

Thenar muscles

24

Muscles that move the small finger

Hypothenar muscles

25

Muscles that move the digits

Lumbricales and interossei muscles

26

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

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

27

The muscles of the thenar eminence are innervated by the

Recurrent median nerve

28

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

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

29

The muscles of the hypothenar eminence are innervated by the

Deep ulnar nerve

30

What are the 4 intrinsic muscles?

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

31

The adductor pollicis muscle function in

Thumb ADduction

32

The Lumbrical muscle functions in

Flexion at MP and extension at IP

33

The dorsal interossei muscle functions in

ABduction of digits 2-4

34

The palmar interossei functions in

ADduction of digits 2, 3, and 5

35

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

Deep ulnar nerve for most
2 Radial lumbricals innervated by median nerve

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

Median nerve

37

Which hand muscles does the median nerve supply?

2LOAF

2 radial Lumbricals
Opponens pollicis
Abductor Pollicis brevis
Flexor pollicis brevis

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

Ulnar nerve

39

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

Ulnar artery

40

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

Radial artery

41

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

Colles' Fracture

42

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

Colles' fracture

43

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

Scaphoid Fracture

44

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

Distal-most joint it crosses

45

Carpel tunnel syndrome is the result of

Inflammation in the carpel tunnel that causes median nerve compression

46

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

C8 and T1

47

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

C6, C7, C8

48

Which digits receive sensory innervation from the Ulnar nerve?

Ulnar 1.5 digits

49

Which digits receive sensory innervation from the Median nerve?

Radial 3.5 digits

Decks in Structure and Function Test 1 Class (61):