Test 3: Wrist & Hand Flashcards Preview

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Flashcards in Test 3: Wrist & Hand Deck (59):
1

Carpal bones- Proximal Row:

• Scaphoid (navicular) "boat shaped"
• Lunate "cresent shaped"
• Triquetrum "three-cornered "
• Pisiform "pea shaped"

2

Carpal bones- Distal Row:

• Hamate "hooked"
• Capitate "head shaped"
• Trapezoid "table shaped"
• Trapezium "little table"

3

Carpal bones enhances our...

Range of Motion

4

What is the most common fractured bone in the body?

Scaphoid

5

What is the most common dislocated bone in the body?

Lunate

6

What part is the thumb missing?

middle

7

How many phalanges are there?

14

8

• weak, thin ligament
• spans from the styloid process of the radius to the scaphoid and
trapezium bones
Function
• Stabilizes lateral aspect of the wrist joint
• Resists Excessive Ulnar Deviation (Adduction)

Radial collateral ligament

9

• short ligamentous band
• attaches to the styloid process of the ulna and then splits into two
sheets as it descends to attach to the triquetral and pisiform bones
Function
• Stabilizes medial aspect of the wrist joint
• Resists Excessive Radial Deviation (Abduction)

Ulnar collateral ligament

10

Wrist (radiocarpal) joint (condyloid)

• Flexion & extension
• Ulnar and radial deviation

11

Metacarpal-phalangeal joints (condyloid)

• Flexion & extension
• Ulnar and radial deviation

12

PIP joints (ginglymus)

Flexion & extenstion

13

DIP joints (ginglymus)

Flexion & extension

14

Carpometacarpal joint

Saddle

15

Metacarpophalangeal

Ginglymus

16

Interphalangeal

Condyloid

17

Origin of the flexor carpi radialis

Common flexor tendon from medial epicondyle of humerus

18

Insertion of flexor carpi radialis

Bases of 2nd and 3rd
metacarpals

19

Action of the flexor carpi radialis

• Flex the wrist
• Abduct the wrist
• May assist to flex the elbow

20

Origin of the palmaris longus

• Common flexor tendon from medial epicondyle of humerus

21

Insertion of the palmaris longus

• Flexor retinaculum and
palmar aponeurosis

22

Action of the palmaris longus

• Tense the palmer fascia
• Flex the wrist
• May assist to flex the elbow

23

Origin of the flexor carpi ulnaris

• Common flexor tendon from medial epicondyle of humerus
• Posterior surface of proximal ⅔ of ulna

24

Insertion of flexor carpi ulnaris

• Pisiform, hook of the hamate,
and base of 5th metacarpal

25

Action of flexor carpi ulnaris

• Flex the wrist
• Adduct the wrist
• Assist to flex the elbow

26

Origin of the flexor digitorum superficials

• Common flexor tendon from medial epicondyle of humerus
• Ulnar collateral ligament
• Coronoid process of the ulna
• Interosseous membrane
• Proximal shaft of radius

27

Insertion of flexor digitorium superficials

• Sides of middle phalanges of
2nd – 5th fingers

28

Action of flexor digitorum superficials

• Flex the 2nd – 5th fingers
• Flex the wrist

29

Origin of flexor digitorum profundus

• Anterior and medial surfaces of proximal ¾ of ulna

30

Insertion of flexor digitorum profundus

• Bases of distal phalanges,
palmer surface of 2nd - 5th fingers

31

Action of flexor digitorum profundus

• Flex the 2nd – 5th fingers
• Assist to flex the wrist

32

Origin of extensor carpi radialis brevis

• Common extensor tendon from the lateral epicondyle of humerus

33

Insertion of extensor carpi radialis brevis

Base of 3rd metacarpals

34

Action of the extensor carpi radialis brevis

• Extend the wrist
• Abduct the wrist
• Assist to flex the elbow

35

Origin of the extensor carpi ulnaris

• Common extensor tendon from the lateral epicondyle of humerus

36

Insertion of the extensor carpi ulnaris

Base of the 5th metacarpal

37

Action of the extensor carpi ulnaris

• Extend the wrist
• Adduct the wrist

38

Origin of the extensor digitorum

• Common extensor tendon from the lateral epicondyle of humerus

39

Insertion of the extensor digitorum

• Bases of middle and distal phalanges of 2nd 5th fingers

40

Action of the extensor digitorum

• Extend the 2nd - 5th fingers
• Assist to extend the wrist

41

Origin of the extensor carpi radialis longus

• Distal ⅓ of the lateral
supracondylar ridge of
humerus

42

Insertion of extensor carpi radialis longus

base of 2nd metacarpal

43

Action of the extensor carpi radialis longus

• Extend the wrist
• Abduct the wrist
• Assist to flex the elbow

44

Origin of flexor pollics longus

• Anterior surface of radius and interosseous membrane

45

Insertion of flexor pollics longus

Base of distal phalanx of thumb

46

Action of flexor pollics longus

• Flex the thumb
• Assist to flex the wrist

47

Origin of the flexor pollics longus

• Posterior surface of ulna and interosseous membrane

48

Origin of the extensor pollicis longus

Posterior surface of ulna and interosseous membrane

49

Insertion of extensor pollicis longus

Base of distal phalanx of thumb

50

Action of extensor pollicis longus

• Extend the thumb
• Abduct the wrist

51

Origin of extensor pollicis brevis

posterior surface of distal/middle radius and interosseous membrane

52

Insertion of the extensor pollicis brevis

base of proximal phalanx of thumb

53

Action of the extensor pollicis brevis

• extension of 1st MCP joint
• abduct the wrist

54

Origin of the Abductor Pollicis Longus

posterior surface of radius and ulna, and interosseous membrane

55

Insertion of abductor pollicis longus

Base of 1st metacarpal

56

Action of abductor pollicis longus

• Abduct the thumb
• Extend the thumb
• Abduct the wrist

57

Origin of the adductor pollicis

• Capitate, 2nd and 3rd metacarpals

58

Insertion of the adductor pollicis

• Base of proximal phalanx of thumb

59

Action of the adductor pollicis

• Adduct the thumb
• Assist to flex the thumb