Concordant but Different: Cognitive Function, Cerebral Anatomy, and Metabolism in Monozygotic Twins With Alzheimer's Disease

Kathleen A. Welsh; John M. Hoffman; William M. McDonald; Nancy L. Earl; John C.S. Breitner

doi:10.1037/0894-4105.7.2.158

Concordant but Different: Cognitive Function, Cerebral Anatomy, and Metabolism in Monozygotic Twins With Alzheimer's Disease

Kathleen A. Welsh, John M. Hoffman, William M. McDonald, Nancy L. Earl, John C.S. Breitner

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	158-171
Number of pages	14
Journal	Neuropsychology
Volume	7
Issue number	2
DOIs	https://doi.org/10.1037/0894-4105.7.2.158
State	Published - Apr 1993
Externally published	Yes

ASJC Scopus subject areas

Neuropsychology and Physiological Psychology

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abstract = "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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AB - 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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Concordant but Different: Cognitive Function, Cerebral Anatomy, and Metabolism in Monozygotic Twins With Alzheimer's Disease

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