The forearm, wrist, and hand Flashcards Preview

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

Flashcards in The forearm, wrist, and hand Deck (80):
1

The forearm extends from the elbow joint to the wrist joint and consists of which two bones?

Radius and Ulna

2

Stretched between the radius and ulna and divides the forearm into anterior and posterior compartments

Interosseous membrane

3

The forearm is innervated by terminal nerves from the brachial plexus. Terminal nerves comprised of ANTERIOR division nerve fibers innervate

Flexor muscles

4

The forearm is innervated by terminal nerves from the brachial plexus. Terminal nerves comprised of POSTERIOR division nerve fibers innervate

Extensor muscles

5

The primary function of the anterior forearm is

Pronation and wrist and digit flexion

6

The primary nerve of the anterior forearm is the

Median nerve

7

The primary blood supply to the anterior forearm is the

Radial and Ulnar arteries

8

The primary function of the posterior forearm is

Supination and wrist and digit extension

9

The primary nerve of the posterior forearm is the

Deep radial nerve

10

The primary blood supply of the posterior forearm is the

Posterior interosseous artery

11

The radius and ulna articulate proximlly with the humerus and with eachother and distally with

Two carpel bones

12

Within the forearm, the radius and ulna articulate via the

Proximal and distal radioulnar joints (synovial) and the Interosseous membrane (fibrous joint)

13

The movements allowed at the proximal and distal radioulnar joints are

Pronation: crossing radius over the ulna
and
Supination: placing the forearm in the anatomical position

14

At the distal forearm and wrist articulation, the radius articulates with scaphoid and lunate carpel bones via synovial

Radiocarpel joints (synovial)

15

The radiocarpel joints are supported by

Radiocarpel ligaments and collateral ligamnets

16

Clinically, radiocarpel joints are relevant for

Disslocation and/or fracture caused by fall on outstretched hand

17

Which bone is commonly fractured in radiocarpel injuries?

Scaphoid bone

18

Structures of the anterior forearm are located anterior to the

Interosseous membrane

19

Anterior forearm muscles are arranged in which three layers

1.) Superficial
2.) Intermediate
3.) Deep

20

What is the function of the anterior forearm muscles located in the superficial, intermediate, and deep layers?

1.) Superficial: forearm pronation and wrist felxion
2.) Intermediate: digit flexion
3.) Deep: forearm pronation and digit flexion

21

Deeper muscles act more

Distally

22

Muscles of the forearm stabilize proximal joints to enable other muscles to function more distally, i.e. they act as

Synergists

23

Innervate all but one and one-half of the anterior forearm muscles

Median nerve and its anterior interosseous branch

24

Innervates the flexor carpi ulnaris muscle and the ulnar half of the flexor digitorum profundus muscle

Ulnar nerve

25

Blood supply to the anterior forearm is supplied by the

Radial, ulnar, and anterior interosseous arteries

26

What are the 5 superficial and intermediate anterior forearm muscles?

1.) Pronator Teres
2.) Flexor carpi radialis
3.) Palmaris Longus
4.) Flexor carpi ulnaris
5.) Flexor digitorum superficialis

27

PROXIMALLY, the pronator teres and flexor carpi ulnaris attach to the

Medial epicondyle of the humerus and the ulna

28

DISTALLY, the pronator teres attaches to the

Radius

29

The function of the pronator teres is

Forearm pronation

30

PROXIMALLY, the flexor carpi radialis, palmaris longus, and flexor digitorum superficualis ALL attach to the

Medial epicondyle of the humerus

31

DISTALLY, the flexor carpi radialis attaches to the

Metacarpels

32

DISTALLY, the palmaris longus attaches to the

Palmar Aponeurosis

33

DISTALLY the flexor carpi ulnaris attaches to the

Pisiform

34

DISTALLY, the flexor digitorum superficialis attaches to the

Middle phalanges: digits 2-5

35

Which superficial and intermediate anterior forearm muscles are innervated by the MEDIAN nerve?

Pronator teres, Flexor carpi radialis, palmaris longus, and flexor digitorum superficialis

36

The function of the flexor carpi radialis is

Wrist flexion and abduction

37

The function of the palmaris longus is

Wrist flexion

38

The function of the flexor carpi ulnaris is

Wrist flexion and adduction

39

The function of the flexor digitorum superficialis is

Flexion at PIP

40

The flexor carpi ulnaris is innervated by the

Ulnar nerve

41

What are the three deep anterior forearm muscles?

Pronator quadratus, flexor digitorum profundus, and flexor pollicis longus

42

PROXIMALLY, the pronator quadratus and flexor digitorum profundus attach at to the

Ulna

43

PROXIMALLY, the flexor pollicis longus attaches to the

Radius

44

DISTALLY, the pronator quadratus attaches to the

Radius

45

DISTALLY, the flexor digitorum profundus attaches to the

Distal Phalanges: digits 2-5

46

DISTALLY, the flexor pollicis longus attaches to the

Distal Phalanx thumb

47

The pronator quadratus and flexor pollicis longus are innervated by the

Anterior Interosseous nerve

48

The flexor digitorum profundus is innervated by the

Enterior interosseous and Ulnar nerves

49

The function of the pronator quadratus is

Forearm pronation

50

The function of the flexor digitorum profundus is

Flexion at DIP

51

The function of the flexor pollicis longus is

Flexion of the distal phalanx of thumb

52

Posterior forearm muscles cross joints of the elbow, wrist and digits. The primary functions are

Forearm supination, wrist extension, and digit extension

53

Posterior forearm muscles are arranged in which two layers?

1.) Superficial: wrist and digit extension
2.) Deep

54

What is the function of the deep posterior forearm muscles?

Forearm supination, extension of the thumb and index finger, and thumb abduction

55

The brachioradialis and extensor carpi muscles are innervated by the

Radial nerve

56

The supinator and extensor carpi radialis brevis muscles are innervated by the

Deep radial nerve

57

The rest of the posterior forearm muscles, i.e. the extensor digitorum, extensor digiti minimi, extensor carpi ulnairs, abductor pollicis longus, extensor pillicis brevis, extensor pollicis longus, and the extensor indicis are ALL innervated by the

Posterior interosseous nerve

58

PROXIMALLY, the Brachioradialis and extensor carpi longus attach to the

Lateral Supracondylar ridge of the humerus

59

PROXIMALLY, the extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, and extensor carpi ulnaris ALL attach to the

Common extensor tendon (lateral epicondyle of the humerus)

60

PROXIMALLY, the abductor pollicis longus, extensor pollicis longus, and the extensor indicis ALL attach to the

Ulna

61

PROXIMALLY, the supinator attaches to the

Lateral epicondyle of the humerus and the ulna

62

PROXIMALLY, the extensor pollicis longus attaches to the

Interosseous membrane

63

What are the DISTAL attachments for the
1.) Brachioradialis
2.) Extensor carpi radialis longus
3.) Extensor carpi radialis brevis

1.) Radius
2.) Metacarpel
3.) Metacarpel

64

What are the DISTAL attachments for the
1.) Extensor digitorum
2.) Extensor digiti minimi
3.) Extensor carpi ulnaris

1.) Phalanges: digits 2-5
2.) Phalange: 5th digit
3.) Metacarpel

65

What are the 6 superficial posterior forearm muscles?

1.) Brachioradialis
2.) Extensor carpi radialis longus
3.) Extensor radialis carpi brevis
4.) Extensor digitorum
5.) Extensor digiti minimi
6.) Extensor carpi ulnaris

66

The function of the brachioradialis is

Flexion of forearm at elbow

67

The function of the extensor carpi radialis longus and extensor carpi radialis brevis is

Wrist extension and ABduction

68

The function of the extensor digitorum is

Extension of digits 2-5

69

The funtion of the extensor digiti minimi is

Extension of the 5th digit

70

The function of the extensor carpi ulnaris is

Wrist extension and ADduction

71

What are the 5 deep posterior forearm muscles?

1.) Supinator
2.) Abductor pollicis longus
3.) Extensor pollicis brevis
4.) Extensor pollicis longus
5.) Extensor indicis

72

What are the DISTAL attachments for the
1.) Supinator
2.) Abductor pollicis longus
3.) Extensor pollicis brevis

1.) Radius
2.) 1st metacarpel
3.) Proximal phalanx of the thumb

73

What are the DISTAL attachments for the
1.) Extensor pollicis longus
2.) Extensor indicis

1.) Distal phalanx of thumb
2.) 2nd metacarpel

74

The function of the supinator is

Supination of the forearm

75

The function of the abductor pollicis longus is

ABduction of the thumb

76

The functions of the extensor pollicis brevis and extensor pollicis longus are

Extension of the thumb

77

The function of the extensor indicis is

Extension of 2nd digit

78

The “gateway” to the wrist and hand for muscle
tendons and important neurovascular structures

The distal forearm

79

Anteriorly, the median nerve passes lateral to the

Palmaris longus tendon

80

Posteriorly, the extensor tendons are compartmentalized by the

-serves to prevent "bowstringing" of the tendons

Extensor retinaculum

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