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Visual hallucination (VH) is common in Parkinson's disease (PD), can cause significant distress to affected individuals and their families, and is associated with worse outcomes
PD and VH patients have worse quality of life, increased mortality, and a higher rate of subsequent dementia, and are more likely to require nursing home care
PD-related hallucinations are accompanied by macroscopic brain network imbalances, abnormal activation of the default mode network and reduced activity of other networks (such as the dorsal attention network)
However, the thalamus is a heterogeneous structure, composed of different nuclei, with different cortical projections and functions
And compared the thickness of white matter and cortex, adjusted for age, gender, time between two scans, and intracranial volume
They found that PD hallucinations showed white matter changes in the corpus callosum at baseline, and the posterior bundle was extensively affected over time
Less extensive changes in cortical thickness only appeared after follow-up
After follow-up, almost all of the thalamic subnuclei showed loss of nerve bundles in PD hallucinated persons compared with non-hallucinated persons
After follow-up, almost all of the thalamic subnuclei showed loss of nerve bundles in PD hallucinated persons compared with non-hallucinated persons
The important significance of this study lies in the discovery: PD hallucinations show white matter loss, especially in the posterior connection and the thalamic nucleus, and the thickness of the cortex is relatively preserved over time
Over time, the thickness of the cortex is relatively preserved
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