Concordant but Different: Cognitive Function, Cerebral Anatomy, and Metabolism in Monozygotic Twins With Alzheimer's Disease
To illustrate the utility of the twin method in Alzheimer's disease (AD) research, we studied in detail a pair of monozygotic twins concordant for the disease but markedly different in their clinical presentations. Neuropsychological evaluation, magnetic resonance brain imaging, and cerebral glucose metabolic studies revealed a typical behavioral presentation for AD in Twin A. In contrast, Twin B showed prominent visuospatial impairments. Although there was no identified cause for the disparate presentations, a close correspondence was observed between the neuropsychological findings and the regional brain measures. The results suggest that the trajectory of AD may vary widely even in genetically identical individuals. Factors accounting for the variability include potential intrauterine, early developmental, and environmental differences.
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Related Subject Headings
- Experimental Psychology
- 5204 Cognitive and computational psychology
- 5202 Biological psychology
- 3209 Neurosciences
- 1702 Cognitive Sciences
- 1701 Psychology
- 1109 Neurosciences
Citation
Published In
DOI
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Experimental Psychology
- 5204 Cognitive and computational psychology
- 5202 Biological psychology
- 3209 Neurosciences
- 1702 Cognitive Sciences
- 1701 Psychology
- 1109 Neurosciences