Publication details
Grey Matter Changes in Cognitively Impaired Parkinson's Disease Patients
| Authors | |
|---|---|
| Year of publication | 2014 |
| Type | Article in Periodical |
| Magazine / Source | Plos one |
| MU Faculty or unit | |
| Citation | |
| Web | http://www.plosone.org/article/fetchObject.action?uri=info:doi/10.1371/journal.pone.0085595&representation=PDF |
| Doi | http://dx.doi.org/10.1371/journal.pone.0085595 |
| Field | Neurology, neurosurgery, neurosciences |
| Keywords | FRONTAL ASSESSMENT BATTERY; ITALIAN POPULATION-SAMPLE; SOURCE-BASED MORPHOMETRY; DEFAULT MODE NETWORK; DIAGNOSTIC-CRITERIA; ALZHEIMERS-DISEASE; NORMATIVE VALUES; CEREBRAL ATROPHY; LEWY BODIES; DEMENTIA |
| Description | Background: Cortical changes associated with cognitive decline in Parkinson's disease (PD) are not fully explored and require investigations with established diagnostic classification criteria. Objective: We used MRI source-based morphometry to evaluate specific differences in grey matter volume patterns across 4 groups of subjects: healthy controls (HC), PD with normal cognition (PD-NC), PD with mild cognitive impairment (MCI-PD) and PD with dementia (PDD). Methods: We examined 151 consecutive subjects: 25 HC, 75 PD-NC, 29 MCI-PD, and 22 PDD at an Italian and Czech movement disorder centre. Operational diagnostic criteria were applied to classify MCI-PD and PDD. All structural MRI images were processed together in the Czech centre. The spatial independent component analysis was used to assess group differences of local grey matter volume. Results: We identified two independent patterns of grey matter volume deviations: a) Reductions in the hippocampus and temporal lobes; b) Decreases in fronto-parietal regions and increases in the midbrain/cerebellum. Both patterns differentiated PDD from all other groups and correlated with visuospatial deficits and letter verbal fluency, respectively. Only the second pattern additionally differentiated PD-NC from HC. Conclusion: Grey matter changes in PDD involve areas associated with Alzheimer-like pathology while fronto-parietal abnormalities are possibly an early marker of PD cognitive decline. These findings are consistent with a non-linear cognitive progression in PD. |
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