What is the primary medical treatment for Parkinson's Disease?

Levodopa (L-dopa) is the primary medical treatment for Parkinson's Disease as it effectively addresses the core symptoms of the condition. Parkinson's Disease is characterized by a deficiency of dopamine, a neurotransmitter crucial for regulating movement. Levodopa serves as a precursor to dopamine, meaning that it is converted into dopamine in the brain, thereby helping to alleviate symptoms such as tremors, stiffness, and bradykinesia (slowness of movement).

This treatment has been a cornerstone of Parkinson's management since its introduction and has shown significant efficacy in improving the quality of life for patients. While other therapies may support treatment or be utilized in specific cases, Levodopa remains the most comprehensive approach for symptom control in Parkinson’s Disease.

The other options provided do not align with established treatment protocols for Parkinson's. Insulin therapy is primarily used for diabetes management, surgery might be considered in advanced or specific scenarios but is not a first-line treatment, and radiation therapy is used for cancer treatment rather than neurodegenerative diseases like Parkinson's. Thus, Levodopa stands out as the mainstay of therapy for this condition.