Which medication is used to treat movement disorders in the nervous system category?

• A. Antidepressants
• B. Anti-Parkinson's
• C. Corticosteroids
• D. Antipsychotic agents

Answer: (B)

Movement disorders involve problems with the brain’s ability to control movement, especially in the circuits of the basal ganglia. The most common and targeted approach to treat these conditions, such as Parkinson’s disease, is to use anti-Parkinson’s medications that enhance dopamine signaling or mimic its effects. Dopamine helps smooth and regulate movement, so restoring its activity—whether by giving levodopa, using dopamine agonists, or applying other drugs that boost or preserve dopamine in the brain—can reduce symptoms like tremor, stiffness, and slowness.

The other options don’t fit as treatments for movement disorders. Antidepressants focus on mood and anxiety, not motor control. Corticosteroids are anti-inflammatory and used for conditions affecting inflammation or immune responses, not to correct motor pathway dysfunction. Antipsychotic agents are used for psychiatric conditions but can actually cause movement problems as side effects, rather than alleviate them. So, drugs designed to restore dopamine function are the ones used to treat movement disorders in the nervous system.