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Anatomy > Wrist > Flashcards

Wrist Flashcards

1
Q

What kind of joint is the wrist joint

A

Radio carpal joint which is a complex biaxial synovial joint

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2
Q

Name the three carpal bones the wrist connects the fore arm to the hand

A

Lunate
Scaphoid
Triquetrum

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3
Q

The order of the carpal bones

A

Scaphoid First
Lunate 2nd
Triquetrum 3rd

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4
Q

Where does the radio carpal joint lie

A

At the proximal wrist crease
Where you see your veins

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5
Q

How many carpal bones are there

A

8

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6
Q

There are 8 carpal bones they are divided into

A

Distal and proximal
4 each

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7
Q

What is one the proximal row( running from thumb to pinky)

A

Scaphoid
Lunate
Triquetral
Pisiform

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8
Q

Distal row?

A

Trapezium 1st
Trapezoid 2nd
Capitate 3rd
Hamate 4th

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9
Q

What is importance thing about articular discs

A

There is no direct contact between the carpals and The end of the ulna so the disc cartilaginous in nature bridges the gap and increases the congruence between the ulna and the carpal

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10
Q

The wrist joint is proximally and distally formed. what is the proximal part made of?

A

The distal end of the radius and articular disc

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11
Q

Distal part?

A

3 proximal carpal bones

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12
Q

The following are proximal carpal bones except
Scaphoid
Pisiform
Lunate
Triquetral

A

Pisiform

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13
Q

The ulna is part of the wrist true or false

A

False

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14
Q

How many joints are in the wrist and name them

A

Radiocarpal joint
Ulnocarpal joint
Distal radioulnar joint

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15
Q

What’s the radiocarpal joint

A

Where the radius joins the first row of wrist bones (the proximal carpal bones scaphoid, lunate, triquetrum)

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16
Q

What’s the ulnocarpal joint

A

Where the ulna meets the lunate and triquetrum

17
Q

Distal radioulnar joint?

A

Where the radius and ulna connect (forearm bones)

18
Q

How many ligaments are there in the wrist and what are they

A

Palmar radiocarpal
Dorsal radiocarpal
Ulna collateral
Radial collateral

19
Q

How is the palmar radiocarpal ligament

A

Runs from the Distal end of the radius and runs to the anterior surface of the proximal carpal bones

20
Q

How’s the dorsal radiocarpal

A

Begins from the lower end of the radius and runs downwards and attaches to the dorsal surface of the proximal carpal bones

21
Q

How’s the ulna collateral

A

it’s extends from the tip of the styloid process of the ulna to the triquetrum and Pisiform bones

22
Q

How’s the radial collateral ligaments

A

It’s extends from the styloid process of the radius to the lateral side of the scaphoid bone and trapezium

23
Q

What is the blood supply of the wrist

A

It receives blood from the branches of the dorsal and Palmar carpal arches derived from the radial and ulnar arteries

24
Q

What is the superficial palmar arch made off

A

Ulna artery plus superficial branch of radial artery

25
Q

What is the deep Palmar arch made of

A

It is made of the radial artery plus deep branch of Ulna artery

26
Q

How many nerve branches do the wrist have?

A

3 . they are
Radial nerve
Ulna nerve and
median nerve

27
Q

What are the nerve branches of the radial, ulna and median nerve

A

Radial nerve- posterior interosseous branch
Ulna nerve- anterior interosseous branch
Median nerve- deep and dorsal branches

28
Q

What is the autonomous testing site for the median nerve and ulna nerve

A

The tip of the index finger and the pinky finger respectively

29
Q

What causes collen fracture (most common)

A

Caused by falling onto an outstretched wrist

30
Q

What happens in Collen’s fracture

A

It’s affects the radius and displaces the distal fragment posteriorly and the ulna styloid process can be damaged and this avulsed in majority of cases

31
Q

The condition diner’s fork deformity is caused by

A

Collen’s fracture

32
Q

What is the most commonly fractured carpal bone

A

Scaphoid bone

33
Q

What causes scaphoid fracture

A

Falling on an outstretched hand (foosh)

34
Q

What is the scaphoid bone prone to on fracture

A

Avascular necrosis

35
Q

Meaning of avascular necrosis of the scaphoid bone

A

Meaning it may interrupt the blood supply of the proximal parts of the scaphoid bone leaving it avascular

Anatomy (4 decks)

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