Parkinson’s disease is a progressive neurological movement disorder that primarily affects movement control. It occurs due to the gradual loss of dopamine-producing nerve cells in a specific area of the brain, leading to characteristic motor and non-motor symptoms. Key Symptoms Parkinson’s disease typically presents with a combination of the following: Tremor at rest, often starting in one hand Bradykinesia (slowness of movement) Muscle rigidity Postural instability and balance problems In addition to movement-related symptoms, patients may experience non-motor symptoms such as sleep disturbances, constipation, mood changes, memory problems, and reduced sense of smell. Causes and Risk Factors The exact cause of Parkinson’s disease is unknown. Factors that may contribute include genetic susceptibility, environmental exposures, and aging.