Neuroimaging in Parkinson’s disease dementia: connecting the dots

Heterogeneous neuroimaging findings in Parkinson’s dementia localise to a common brain network centred on the hippocampus. This result is symptom and disease-stage specific, as visual hallucinations and mild cognitive impairment map to different networks. These results make sense of an otherwise discordant neuroimaging literature, lending insight into Parkinson’s dementia.