Statistics show MND, also known as amyotrophic lateral sclerosis (ALS), normally strikes people aged 50 to 70, but currently the youngest sufferer in the UK is just 23.
Average life expectancy after the onset of symptoms is just two to five years, as there is no cure and no treatment.
The cause is still unknown and there are some 5,000 people living with the disease at any one time in the UK alone.
Every day, three people in the UK die from MND and another three are diagnosed with it.
Public figures with the disease include professor Steven Hawking, who has astonishingly been living with the disease for some 40 years, and Hollywood actor David Niven who died from MND in 1983.
To donate to the Motor Neurone Disease Association, or to volunteer your time to help the charity, call 01604 611860.
For help and advice on coping with the disease, call 08457 626262 or visit www.mndassociation.org