Which syndrome is defined by compulsive, self-gratifying behaviors such as gambling, sex, or shopping and is seen in some PD patients; management involves reducing dopamine agonist?

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Dopamine dysregulation syndrome arises when dopaminergic therapy in Parkinson’s disease overstimulates the brain’s reward pathways, leading to compulsive, self-gratifying behaviors such as gambling, hypersexuality, or shopping. These behaviors reflect enhanced reinforcement from dopamine signaling, often linked to dopamine agonist medications. Because the impulses are tied to the pharmacologic drive, reducing or stopping the dopamine agonist typically diminishes the problematic behaviors and may allow the patient’s impulse control to improve. This condition is distinct from punding, which involves repetitive, goal-directed but non-rewarding activities (like sorting or collecting) rather than reward-driven compulsions. Movement disorders like chorea or athetosis are unrelated to this impulse-control syndrome.