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An Experimental Paradigm for Measuring the Effects of Ageing on Sentence Processing
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The Effect of Age on Post-Stroke Language Outcomes.

Sophie M Roberts1, Rachel M Bruce1, Thomas M H Hope1

  • 1Department of Imaging Neuroscience, University College London, London, UK, ucl.ac.uk.

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Summary

Older age at stroke onset worsens post-stroke language abilities, especially with larger lesions and initial severity. Age does not hinder language recovery, but assessment interpretation should consider age for accuracy.

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Area of Science:

  • Neurology
  • Psycholinguistics
  • Gerontology

Background:

  • Chronological age is a factor in stroke recovery.
  • Understanding age-related language deficits post-stroke is crucial.

Purpose of the Study:

  • Investigate the impact of chronological age at stroke onset on language abilities and recovery.
  • Identify language tasks sensitive to age.
  • Examine if age effects are modified by lesion size, initial severity, or education.
  • Determine if age influences aphasia recovery.

Main Methods:

  • Assessed language abilities in 749 participants using the Comprehensive Aphasia Test (CAT) and self-reported measures.
  • Utilized multiple linear regression to analyze CAT scores and self-reported recovery at 1 year post-stroke.
  • Controlled for lesion size, initial severity, sex, handedness, education, and time post-stroke.

Main Results:

  • Older age at stroke onset correlated with poorer performance in multiple language domains (e.g., repetition, fluency, naming, comprehension).
  • Age-related disadvantages were amplified in individuals with larger lesions and more severe initial aphasia.
  • No evidence indicated that older age hindered language recovery across subgroups.

Conclusions:

  • Older age at stroke onset significantly impacts post-stroke language outcomes.
  • Aphasia assessments are sensitive to age-related differences.
  • Age should be considered in interpreting assessment scores for optimized diagnosis and prognosis.