Articles from Neurology

Link to journal
Virtanen, J K. ; Siscovick, D S.; Longstreth, W T. Jr ; Kuller, L H.
Fish consumption and risk of subclinical brain abnormalities on MRI in older adults
Neurology. 71(6):439-446, August 5, 2008.
Abstract
Objective: To investigate the association between fish consumption and subclinical brain abnormalities.Methods: In the population-based Cardiovascular Health Study, 3,660 participants age >=65 underwent an MRI scan in 1992-1994. Five years later, 2,313 were scanned. Neuroradiologists assessed MRI scans in a standardized and blinded manner. Food frequency questionnaires were used to assess dietary intakes. Participants with known cerebrovascular disease were excluded from the analyses.Results: After adjustment for multiple risk factors, the risk of having one or more prevalent subclinical infarcts was lower among those consuming tuna/other fish >=3 times/week, compared to <1/month ci =" 0.54-1.01," p =" 0.06," trend =" 0.03)."

Desikan, R S. ; Fischl, B ; Cabral, H J. ; Kemper, T L. ; Guttmann, C R. ; Blacker, D et al
MRI measures of temporoparietal regions show differential rates of atrophy during prodromal AD
Neurology. Status Publish Ahead of Print, POST AUTHOR CORRECTIONS, 30 July 2008 Background: MRI studies have demonstrated differential rates of atrophy in the entorhinal cortex and hippocampus during the prodromal phase of Alzheimer disease (AD). The current study was designed to determine whether a broader set of temporoparietal regions show differential rates of atrophy during the evolution of AD.Methods: Sixteen regions of interest (ROIs) were analyzed on MRI scans obtained at baseline and follow-up in 66 subjects comprising three groups: controls = individuals who were cognitively normal at both baseline and follow-up; nonconverters = subjects with mild cognitive impairment (MCI) at both baseline and follow-up; converters had MCI at baseline but had progressed to AD at follow-up.Results: Annualized percent change was analyzed with multivariate analysis of variance (MANOVA), covaried for age. The MANOVA demonstrated an effect of group (p = 0.004). Post hoc comparisons demonstrated greater rates of atrophy for converters vs nonconverters for six ROIs: hippocampus, entorhinal cortex, temporal pole, middle temporal gyrus, fusiform gyrus, and inferior temporal gyrus. Converters showed differentially greater rates of atrophy than controls in five of the same ROIs (and inferior parietal lobule). Rates of change in clinical status were correlated with the atrophy rates in these regions. Comparisons between controls and nonconverters demonstrated no differences.Conclusion: These results demonstrate that temporoparietal regions show differential rates of atrophy on MRI during prodromal Alzheimer disease (AD). MRI data correlate with measures of clinical severity and cognitive decline, suggesting the potential of these regions of interest as antemortem markers of prodromal AD.(C)2008AAN Enterprises, Inc.