Depressor labii inferioris

Looks like

A flat four-sided muscle below the lower lip, running from the front of the jawbone up into the lip.

What it does

Pulls the lower lip down and slightly out, showing the lower teeth.

Keeping it well

Powered by the facial nerve's lowest branch. A new crooked lower lip after surgery or with other facial weakness needs a doctor.

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