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Language in ageing persons with Down syndrome
Jean A Rondal1, Annick Comblain
1Laboratoire de Psycholinguistique, University of Liege, Belgium. JA.Rondal@ulg.ac.be
Summary
Language abilities in adults with Down syndrome remain stable from adolescence to late adulthood. Cerebral metabolic rate may decrease, but this does not correlate with language decline in individuals with Down syndrome.
Area of Science:
- Neuroscience
- Linguistics
- Genetics
Background:
- Down syndrome is a genetic disorder associated with cognitive and developmental differences.
- Previous research on language in Down syndrome has yielded varied results.
- Understanding language stability and brain changes in adults with Down syndrome is crucial.
Purpose of the Study:
- To investigate the longitudinal changes in language abilities in adults with Down syndrome.
- To examine the relationship between cerebral metabolic rate and language function over time.
Main Methods:
- Cross-sectional and longitudinal studies analyzed language skills (morphosyntax, lexicon) in individuals aged 14-50.
- Positron Emission Tomography (PET) measured cerebral metabolic rate (CMR) using fluorodeoxyglucose over 4 years in 7 participants (aged 37-49).
Main Results:
- No significant changes were found in receptive or productive language measures across different age groups.
- A gradual decrease in global CMR was observed in participants over the 4-year study period.
- This metabolic decline did not correlate with any observed language deterioration.
Conclusions:
- Language skills in adults with Down syndrome are notably stable throughout adulthood.
- Cerebral metabolic rate can decline with age in this population without impacting language abilities.
- Further research is needed to understand the mechanisms underlying preserved language function despite metabolic changes.
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