What causes MND?

The exact cause of MND is not known. You can’t catch MND from somebody.

Generally, MND is believed to be caused because of a combination of environmental, lifestyle and genetic factors. Most cases of MND develop without an obvious cause.

Around 1 in 10 cases are ‘familial’, meaning the condition is inherited. This is due to a genetic mutation, or an error in the gene.

If you have an MND-related genetic mutation, your children have a 50/50 chance of inheriting that MND-related genetic mutation.

If someone in your family has MND, other people in the family can be tested for the genetic mutation. A test is arranged after you have met with a genetic counsellor. You will also receive support and counselling about the possible test results. The test is usually done by a blood sample.

People who inherit the genetic mutation have a high chance of developing MND. But, it is important to remember that not all people with the genetic mutation will develop MND.