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fibula

The thin outer bone of the lower leg, beside the larger tibia.

FIB-yuh-luh noun

What it means

One of the two bones between the knee and the ankle. It carries little body weight, but its lower end forms the bony bump on the outside of the ankle. It is often broken in ankle injuries. The peroneal nerve wraps around its top, just below the knee, where a tight cast or brace can injure it.

For the nurse

In a client with a leg cast, check that they can lift the foot and toes and feel the top of the foot, which shows the nerve near the fibula is working.

At a glance

Spanishperoné
Also writtenfibular

Related terms

tibia

The large inner bone of the lower leg, between the knee and the ankle; the shinbone.

femoral

Relating to the thigh or the femur, the thigh bone.

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