About one in 10 people with MND have a family history of the condition, like Campbell.
“We thought it might have been inherited because my dad and his brother both had it, but I never really thought of it as something that would happen to me.
“You always think it’s going to happen to someone else,” he said.
Inherited MND, external can happen when there is a change in a gene or genes that tell our bodies how to make or manage proteins in our bodies.
A changed gene can be passed down from parent to child.
There are a large number of genes which can cause inherited MND.
Campbell’s family are affected by “one of the rarest genes”.
“I think we’re the only family in Ireland with this gene that causes MND, and it’s called FUS,” he said.
Campbell and his sister, who also has MND, are taking part in a clinical trial in Dublin, that specifically targets the FUS gene.
“The first 16 months I was on the trial it looks like I was on the placebo,” he explained.
“When I’ve been on the real drug for four or five doses now, it does seem to be doing something because for the first time in over two years I can now wiggle my toes, which is amazing,” he said.