Abstract
The current study aimed to assess the relationship between the neuropsychiatric symptoms in Alzheimer's disease (AD) and the regional grey matter (GM) volume using voxel based morphometry (VBM). Data of 85 AD patients, 208 subjects with mild cognitive impairment (MCI), and 131 healthy controls were selected from the Alzheimer's Disease Neuroimaging Initiative. Individual VBM models across the entire sample for each items of the Neuropsychiatric Inventory Questionnaire as variables of interest were specified with four nuisance covariates, including age, sex, total intracranial volume (TIV), and Mini-Mental State Examination (MMSE) score. Agitation was related to the GM atrophy in the left inferior frontal/insula and bilateral retrosplenial cortices. Aberrant motor behavior (AMB) was related to the GM reductions in the right basal ganglia. The VBM models were recalculated by specifying three nuisance covariates (age, sex, TIV), and by excluding voxels related to AD severity by applying a MMSE mask. This procedure confirmed the first results, and additionally revealed associations between depression and GM atrophy in the left middle frontal cortex, between agitation and the GM atrophy in the left middle frontal cortex, and between...Continue Reading
Citations
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