🦴 Fibula

Brian Lee
Jul 02, 2025
Reviewed

Summary

The fibula is the slender lateral bone of the leg that runs parallel to the tibia. It bears little weight but provides surfaces for muscle attachment and forms the outer part of the ankle joint.

Illustrations

Illustration of the human skeleton with fibulas (or calf bones)
        highlighted in red.
Anatomography, CC BY-SA 2.1 JP, via Wikimedia Commons
Braus 1921 293
Braus, Hermann, Public domain, via Wikimedia Commons

Bony Landmarks

Rounded proximal end articulating with the tibia.

Neck

Narrow region just distal to the head.

Shaft

Long, thin body of the bone.

Lateral malleolus

Distal projection forming the outer ankle and attachment point for the fibular collateral ligament.

Muscle Origins

Muscle Insertions

Head

References