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There is no cure for MND and the disease is fatal, however the disease progresses at different speeds in patients.

People with MND are expected to live two to five years after the symptoms first manifest, although 10 per cent of sufferers live at least 10 years. 

The NHS describes motor neurone disease (MND) as: 'An uncommon condition that affects the brain and nerves. It causes weakness that gets worse over time.'

The weakness is caused by the deterioration of motor neurons, upper motor neurons that travel from the brain down the spinal cord, and lower motor neurons that spread out to the face, throat and limbs. 

It was first discovered in 1865 by a French neurologist, Jean-Martin Charcot, hence why MND is sometimes known as Charcot's disease. 

In the UK, Amyotrophic Lateral Sclerosis (ALS) is referred to as Motor Neurone Disease, while in the US, ALS is referred to as a specific subset of MND, which is defined as a group of neurological disorders.

However, according to Oxford University Hospitals: 'Nearly 90 per cent of patients with MND have the mixed ALS form of the disease, so that the terms MND and ALS are commonly used to mean the same thing.' 

Weakness in the ankle or leg, which may

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