Ozzy Osbourne lived with Parkinson's disease for years before his death. Here's what you need to know about the neurodegenerative disease.

Heavy metal rocker Ozzy Osbourne died this week aged 76, just weeks after his farewell show and about five years after announcing he had Parkinson’s disease. Here’s what to know about the disease.

The three main symptoms are tremor (shaking), slowness of movement and rigidity (muscle stiffness). Subtle changes in a person’s walking pattern could be an early sign of Parkinson’s disease. Some people develop very small handwriting, a loss in their sense of smell, nerve pain or insomnia.