India, May 14 -- Parkinson's disease primarily occurs due to gradual degeneration of dopaminergic neurons in the inner part of the brain. The condition is marked by tremors, rigidity, slowness of movement, and postural instability. Usually observed in older adults, Parkinson's disease is also referred to as idiopathic Parkinson's disease.

Early onset of Parkinson's disease refers to the condition observed in people below the age of 50. In an interview with HT lifestyle, Dr Rajesh B Iyer, Consultant - Neurology And Epileptology, Manipal Hospital Millers Road said, "About 10 percent of patients develop early-onset Parkinson's disease among which 20 percent of them may have the disease much earlier even before 40 years of age. The vast majo...