Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

► Med Misc 25 > Wrist Joint > Flashcards

Wrist Joint Flashcards

1
Q

What is the wrist joint also known as?

A

The radiocarpal joint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What kind of joint is the wrist joint?

A

A synovial joint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What does the wrist mark?

A

The area of transition between the forearm and the hand

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the wrist joint formed by distally?

A

The proximal row of the carpal bones (except the pisiform)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the wrist joint formed by proximally?

A

The distal end of the radius, and the articular disc

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Is the ulna part of the wrist joint?

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What prevents the ulna from articulating with the carpal bones?

A

A fibrocartilaginous ligament, called the articular disc, which lies over the superior surface of the ulna

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What do the carpal bones form together?

A

A convex surface

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What shape is the radius and articular disc?

A

Concave

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Where does the wrist joint receive blood from?

A

Branches of the dorsal and palmar carpal arches

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the branches of the dorsal and palmar carpal arches derived from?

A

The ulnar and radial arteries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the wrist innervated by?

A

Medial nerve- anterior interosseous branch
Radial nerve- posterior interosseous branch
Ulnar nerve- deep and dorsal branches

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What contributes to the stability of the wrist?

A

The joint capsule and ligaments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How many layers of the joint capsule of the wrist are there?

A

Two

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What does the fibrous outer layer of the joint capsule of the wrist attach to?

A

The radius, ulna and proximal row of the carpal bones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the internal layer of the joint capsule of the wrist joint composed of?

A

A synovial membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What does the synovial membrane of the wrist joint do?

A

Secretes synovial fluid which lubricates the joint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are the ligaments of note in the wrist?

A

Palmar radiocarpal
Dorsal radiocarpal
Ulnar collateral
Radial collateral

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Where is the palmar radiocarpal ligament found?

A

On the palmar (anterior) side of the hand

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Where does the palmar radiocarpal ligament pass?

A

From the radius to both rows of carpal bones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is the function of the palmar radiocarpal ligament?

A

Increase stability

Ensure that the hand follows the forearm during supination

22
Q

Where is the dorsal radiocarpal ligament found?

A

On the dorsum (posterior) side of the hand

23
Q

Where does the dorsal radiocarpal ligament pass?

A

From the radius to both rows of carpal bones

24
Q

What is the function of the dorsal radiocarpal ligament?

A

Contributes to the stability of the wrist

Ensures that the hand follows the forearm during pronation

25
Q

Where does the ulnar collateral ligament run?

A

From the ulnar styloid process to the triquetrum and pisiform

26
Q

What does the ulnar collateral ligament do?

A

Works in union with other collateral ligament to prevent excessive lateral joint displacement

27
Q

Where does the radial collateral ligament run?

A

From the radial styloid process to the scaphoid and trapezium

28
Q

What does the radial collateral ligament do?

A

Works in union with the other collateral ligament to prevent excessive lateral joint displacement

29
Q

What type of synovial joint is the wrist?

A

A ellipsoid type

30
Q

What does the joint being an ellipsoid type allow for?

A

Movement along two axes, meaning that flexion, extension, adduction and abduction can all occur at the wrist joint

31
Q

What are the movements of the wrist performed by?

A

Muscles of the forearm

32
Q

What produces flexion at the wrist?

A

Mainly the flexor carpi ulnaris and flexor carpi radialis, with assistance from the flexor digitorum superficialis

33
Q

What produces extension at the wrist?

A

Mainly by the extensor carpi radialis longus and brevis, and the extensor carpi ulnaris, with assistance from the extensor digitorum

34
Q

What produces adduction at the wrist?

A

Extensor carpi ulnaris and flexor carpi ulnaris

35
Q

What produces abduction at the wrist?

A

Abductor pollicis longus, flexor carpi radialis, extensor carpi radialis longus and brevis

36
Q

What happens in the event of the blow to the wrist?

A

The scaphoid takes most of the force

37
Q

Who is a fractured scaphoid more common in?

A

The younger population

38
Q

How is the scaphoids blood supply unique?

A

In runs distal to proximal

39
Q

What can a fracture of the scaphoid disrupt?

A

The blood supply to the proximal portion

40
Q

What can failure to revascularise the scaphoid lead to?

A

Avascular necrosis, and future arthritis

41
Q

What is the main clinical sign of a scaphoid fracture?

A

Tenderness in the anatomical snuffbox

42
Q

How can anterior dislocation of the lunate occur?

A

Falling on a dorsiflexed wrist

43
Q

What happens when falling on the dorsiflexed wrist?

A

The lunate is forced anteriorly, and compresses the carpal tunnel

44
Q

What is the result of the compression of the carpal tunnel by the lunate?

A

Causes the symptoms of carpal tunnel syndrome

45
Q

How does anterior dislocation of the lunate manifest clinically?

A

Paresthesia in the sensory distribution of the median nerve and weakness of the thenar muscles

46
Q

What is required when there is anterior dislocation of the lunate?

A

Immediate clinical attention

47
Q

Why is immediate clinical attention required when there is an anterior dislocation of the lunate?

A

The lunate can undergo avascular necrosis

48
Q

What is the most common pathology involving the wrist?

A

Colles’ fracture

49
Q

What is the Colles’ fracture caused by?

A

Falling onto an outstretched hand

50
Q

What can happen with radius fractures, with the distal fragment being displaced posteriorly?

A

The ulnar styloid process can also be damaged, and is avulsed in the majority of cases

51
Q

What does Colles’ fracture produce?

A

‘Dinner fork deformity’

► Med Misc 25 (69 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions