Abstract:
OBJECTIVE:To use arterial spin labelling to investigate differences in perfusion in mild cognitive impairment with Lewy bodies (MCI-LB) compared to Alzheimer type MCI (MCI-AD) and healthy controls. METHODS:We obtained perfusion images on 32 MCI-LB, 30 MCI-AD and 28 healthy subjects of similar age. Perfusion relative to cerebellum was calculated, and we aimed to examine differences in relative perfusion between MCI-LB and the other groups. This included whole brain voxelwise comparisons, as well as using predefined region-of-interest ratios of medial occipital to medial temporal, and posterior cingulate to precuneus. Differences in occipital perfusion in eyes open vs eyes closed conditions were also examined. RESULTS:Compared to controls, the MCI-LB showed reduced perfusion in the precuneus, parietal, occipital and fusiform gyrus regions. In our predefined regions, the ratio of perfusion in occipital/medial temporal was significantly lower, and the posterior cingulate/precuneus ratio was significantly higher in MCI-LB compared to controls. Overall, the occipital perfusion was greater in the eyes open vs closed condition, but this did not differ between groups. CONCLUSION:We found patterns of altered perfusion in MCI-LB which are similar to those seen in dementia with Lewy bodies, with reduction in posterior parietal and occipital regions, but relatively preserved posterior cingulate.
journal_name
J Neuroljournal_title
Journal of neurologyauthors
Firbank MJ,O'Brien JT,Durcan R,Allan LM,Barker S,Ciafone J,Donaghy PC,Hamilton CA,Lawley S,Lloyd J,Roberts G,Taylor JP,Thomas AJdoi
10.1007/s00415-020-10271-1subject
Has Abstractpub_date
2020-10-21 00:00:00eissn
0340-5354issn
1432-1459pii
10.1007/s00415-020-10271-1pub_type
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