Brain's 'Optimism' and 'Pessimism' signals mapped in Parkinson's study

This study looks at how the brain processes optimistic and pessimistic signals related to dopamine, a chemical that helps control movement and mood. Researchers will compare 70 people with Parkinson's disease and 70 healthy volunteers using brain scans while they play a reward-based game. The goal is to understand why Parkinson's symptoms occur and how medication might affect these brain signals.