Fibula

The fibula is one of the two bones which make up the lower leg (humans), or back leg in tetrapods. The other one is the tibia. Above them is the knee and femur; below are the feet. Muscles are attached to the top of the fibula which help move the knee. It is also used to support the knee and the tibia.

Fibula
Position of fibula in human body (shown in red)
Cross section of human lower leg, showing fibula in centre (latin terminology)
Details
Pronunciation	/ˈfɪbjʊlə/[1][2]
Articulations	Superior and inferior tibiofibular joint Ankle
Identifiers
Latin	(os) fibula
MeSH	D005360
TA	A02.5.07.001
FMA	24479
Anatomical terms of bone [edit on Wikidata]

Human leg bones

Structure

The bone has the following components:

• Lateral malleolus
• Interosseous membraneconnecting the fibula to the tibia, forming a syndesmosis joint
• The superior tibiofibular articulation is an arthrodial joint between the lateral condyle of tibia of the tibia and the head of the fibula.
• The inferior tibiofibular articulation (tibiofibular syndesmosis) is formed by the rough, convex surface of the medial side of the lower end of the fibula, and a rough concave surface on the lateral side of the tibia.