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► Med Misc 25 > Radius > Flashcards

Flashcards in Radius Deck (36):
1

What is the radius?

A long bone in the forearm

2

Where does the radius lie?

Laterally and parallel to the ulna

3

What does the radius do?

Pivots around the ulna at the proximal and distal radio-ulnar joint

4

Where does the radius articulate?

Elbow joint 
Proximal radioulnar joint 
Wrist joint 
Distal radioulnar joint

5

What is the elbow joint formed by?

Partly, an articulation between the head of the radius and the capitulum of the humerus

6

What forms the proximal radioulnar joint?

An articulation between the radial head and the radial notch of the ulna

7

What forms the wrist joint?

An articulation between the distal end of the radius and the carpal bones

8

What forms the distal radioulnar joint?

An articulation between the ulnar notch and the head of the ulna

9

Where does  proximal end of the radius articulate?

In the elbow and proximal radioulnar joints

10

What are the important landmarks of the proximal region of the radius?

Head
Neck
Radial tuberosity

11

What shape is the head of the radius?

Disk shaped, with a concave articulating surface. 
Thicker medially

12

What does the head of the radius take part in?

The proximal radioulnar joint

13

What is the neck of the radius?

A narrow area of bone

14

Where does the neck of the radius lie?

The radial head and radial tuberosity

15

What is the radial tuberosity?

A bony projection

16

What does the radial tuberosity serve as?

The place of attachment of the biceps brachii muscle

17

What happens to the radial shaft as it moves distally?

It expands in diameter

18

What shape is the shaft of the radius?

Triangular

19

What does the shaft of the radius have?

Three borders and three surfaces

20

What is in the middle of the lateral surface of the radial shaft?

A small roughening for the attachment of the pronator teres muscle

21

What happens to the radius in the distal region?

It expands to form a rectangular end

22

What happens to the lateral side of the distal region of the radius?

It projects distally as the styloid process

23

What is in the medial surface of the distal region of the radius?

A concavity called the ulnar notch

24

What does the ulnar notch do?

Articulates with the head of the ulna

25

What is formed when the ulnar notch articulates with the head of the ulna?

The distal radioulnar joint

26

What does the distal surface of the radius have?

Two facets for articulation with the scaphoid and lunate carpal bones

27

What is formed with the articulation of the radius and carpal bones?

The wrist joint

28

What are the common fracture types involving the radius?

Colles’ fracture
Fractures of the radial head 
Smith’s Fracture

29

What is the most common type of radial fracture?

Colles’ fracture

30

What causes Colles’ fracture?

A fall onto an outstretched hand

31

What happens in a Colles’ fracture?

A fracture of the distal radius  The structures distal to the fracture (wrist and hand) are displaced posteriorly

32

What does a Colles’ fracture produce?

A ‘dinner fork’ deformity

33

What are fractures of the radial head characteristically due to?

Falling on an outstretched hand

34

What happens in fractures to the radial head?

The radial head is forced into the capitulum of the humerus, causing it to fracture

35

What causes a Smith’s fracture?

Falling onto the back of the hand

36

What happens in Smith’s fracture?

The distal fragment is now placed anteriorly