Fibula Flashcards Preview

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Flashcards in Fibula Deck (18):
1

Where is the fibula found?

Laterally to the tibia

2

How does the fibula differ from the tibia?

It’s much thinner

3

What is the main function of the fibula?

To act as an attachment for the muscles

4

Why is the main function of the fibula not as a weight bearer?

Because it doesn’t articulate with the femur at the knee

5

What does the fibula have at the proximal end?

An enlarged head

6

What does the head of the fibula contain?

A facet for articulation with the lateral condyle of the tibia

7

Where can the common fibular nerve be found?

On the posterior and lateral surface of the fibular neck

8

What does the fibular shaft have?

Three surfaces- the anterior, lateral and posterior

9

What is the leg split into?

Three compartment

10

What does each surface of the fibular shaft face?

Its respective compartment, e.g. the anterior surface faces the anterior compartment of the leg

11

What happens to the lateral surface?

In continues inferiorly, and is called the lateral malleolus

12

How does the lateral malleolus differ from the medial malleolus?

It is more prominent

13

Where can the lateral malleolus be palpated?

At the ankle on the lateral side of the leg

14

What part of the fibula is prone to fracture?

The lateral malleolus

15

What are the main mechanisms of lateral malleolus fracture?

By forced external rotation of the ankle 
The foot being twisted outwards

16

How does forced external rotation of the ankle cause a lateral malleolus fracture?

The force of the talus against the bone causes a spiral fracture of the lateral malleolus

17

What is it called when the foot is twisted outwards?

Eversion

18

How does eversion cause a fracture of the lateral malleolus?

The talus presses against the lateral malleolus, which causes a transverse fracture