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Language changes in bilingual individuals with Alzheimer's disease
Becca L Stilwell1, Rebecca M Dow2, Carolien Lamers1
1North Wales Clinical Psychology Programme, School of Psychology, Bangor University, Bangor, UK.
International Journal of Language & Communication Disorders
|October 20, 2015
Summary
Alzheimer's disease (AD) impacts bilinguals, affecting both languages. Research indicates the non-dominant language may be more sensitive to AD progression in bilingual individuals.
Area of Science:
- Neurolinguistics
- Cognitive Neuroscience
- Gerontology
Background:
- Alzheimer's disease (AD) prevalence is rising in bilingual populations.
- Limited understanding exists regarding AD's specific impact on the two languages of bilingual individuals.
- Investigating language function in bilinguals with AD is crucial for targeted interventions.
Purpose of the Study:
- To systematically review existing literature on Alzheimer's disease (AD) and its effects on bilingual individuals.
- To synthesize current knowledge on language performance in bilinguals with AD.
Main Methods:
- A comprehensive literature search was conducted across three electronic databases.
- 186 articles were retrieved, with nine selected for review based on inclusion criteria.
- The review captured diverse research methodologies used to assess language changes in bilingual individuals with AD.
Main Results:
- Both bilingual individuals with Alzheimer's disease (BIAD) and controls performed better in their dominant language compared to their non-dominant language.
- Current literature suggests AD affects both languages in bilingual individuals, though preliminary data indicate potential differential sensitivity.
- The non-dominant language, and potentially the dominant language, may show increased sensitivity to AD pathology.
Conclusions:
- There is a need for more rigorous, clinically applicable research designs to advance our understanding of AD in bilinguals.
- Future research should test current theoretical frameworks to guide the development of effective assessments and person-centered care.
- Developing tailored diagnostic and care strategies for bilingual individuals with AD is essential.
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