BackgroundDeep brain stimulation (DBS) is an established therapy for advanced Parkinson’s disease (PD). However, its impact on neuropsychological outcomes remains controversial and lacks systematic integration. This study aims to systematically evaluate the effects of DBS on cognitive and neuropsychiatric symptoms in PD patients through a meta-analysis of randomized controlled trials (RCTs).MethodsA systematic search was conducted in databases including PubMed, Embase, the Cochrane Library, and