More than a quarter of a century after he was diagnosed with Parkinson’s disease, actor Michael J. Fox has revealed that he uses humour to deal with the debilitating condition, and often finds that he “can’t stop laughing” at his inability to perform everyday tasks.

The 55 year old Back To The Future star was diagnosed with the devastating neurological condition, which causes the sufferer’s movement to become slow, erratic and imprecise, in 1991 at the age of just 29. Ever since, he has been a campaigner for research into the condition, creating his own foundation for the purpose.

Michael J FoxMichael J. Fox has suffered from Parkinson's disease for 26 years

However, speaking in a new interview with AARP magazine, Fox said that he had begun to find his symptoms more amusing than upsetting. He described making a coffee for his wife Tracey and carrying it to her, only to spill most of it because he cannot control his shaking.

“’Here's your coffee, dear - enjoy!’” he exclaimed with dark humour, but added that he never seeks sympathy for his condition.

“The truth is that on most days, there comes a point where I literally can't stop laughing at my own symptoms,” he said. “The thing that makes it hilarious to me is when I think of someone else watching all this and thinking, 'Poor Michael can't even get the coffee - it's so sad'.”

More: Jodie Foster and Michael J. Fox attend anti-Trump travel ban rally

Having gone public with his diagnosis in 1998, Fox said that eventually he became accustomed to dealing with “people's perception of the condition” as well as the disease itself.

“It was easy for me to tune in to the way other people were looking into my eyes and seeing their own fear reflected back,” he told the magazine. “I'd assure them that 'I'm doing great' - because I was. After a while, the disconnect between the way I felt and the dread people were projecting just seemed, you know, funny.”

At the end of the interview, Fox warned against cuts to Obamacare that were being threatened by the new Trump administration, under which Parkinson’s sufferers could face annual bills of up to $17,000.

“If the Affordable Care Act and even MediCare come under the knife that's not political. That's our lives.”

More: Michael J. Fox joins Coldplay on stage to perform songs from ‘Back To The Future’