Parkinson disease is marked by a selection degeneration of dopaminergic neuron in the brain stem and it is the second most common neurodegenerative disorder. Parkinson’s disease (PD) is a progressive neurological disorder characterized by a large number of motor and non-motor features that can impact on the function to a variable degree. In most instances, Parkinson disease is thought to result from a complex interaction between multiple genetic and environmental factors, though rare monogenic forms of the disease do exist. In this research paper, I will summarize the current knowledge and understanding of the Parkinson disease. In brief, I will review what the disorder, etiology, Signs and Symptoms, Diagnostic procedures, Treatment, and Prognosis.
