Zygomaticus major & minor

Looks like

Two straps running from the cheekbone down to the corner of the mouth.

What it does

Pull the mouth up and out — the smile.

Keeping it well

Nothing needed; on one side only, a drooping smile is Bell's palsy or a stroke.

Related conditions

• Bell's palsy
• Botulism
• Fibromyalgia
• Frailty & falls in older age
• Heat exhaustion & heatstroke
• Malnutrition & refeeding syndrome
• Muscular dystrophy
• Polymyalgia rheumatica
• Rhabdomyolysis
• Sarcoma
• Sarcopenia
• Tension-type headache
• Tetanus