Fibularis tertius

Looks like

A small muscle at the lower outer front of the leg, a split-off slip of the long toe extensor, ending on the fifth foot bone.

What it does

Lifts the foot and turns the sole outward, helping the toes clear the ground in walking.

Keeping it well

Missing in some people without any trouble; rarely injured.

Related conditions

• Achilles tendon rupture
• Botulism
• Chronic venous insufficiency
• Compartment syndrome
• Fibromyalgia
• Frailty & falls in older age
• Growing pains
• Heat exhaustion & heatstroke
• Lymphangitis
• Lymphatic filariasis (elephantiasis)
• Lymphoedema
• Malnutrition & refeeding syndrome
• Muscular dystrophy
• Polymyalgia rheumatica
• Restless legs syndrome
• Rhabdomyolysis
• Sarcoma
• Sarcopenia
• Superficial thrombophlebitis
• Tetanus
• Varicose veins
• Venomous snakebite