Visual hallucinations (VH) is a commonly occurring psychosis symptom in Parkinson’s disease (PD). However, neuropathology of VH in PD is not clearly known, thereby limiting the efficacy of therapeutic strategies. To mitigate this gap, we evaluated functional connectivity (FC) changes and network organisation, related to VH in PD. PD patients exhibited widespread reduction in interhemispheric FC and local network topology of temporal, frontal, parietal, striatal, limbic, cerebellar, occipital and sensory motor regions. Patients with psychosis displayed larger FC reductions, particularly in cerebellar regions and their connections with frontal and occipital regions. Topological changes in temporal regions seen across PD patients
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