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Hyperintensities and fronto-subcortical atrophy on MRI are substrates of mild cognitive deficits after stroke

Emma Burton1, Clive Ballard, Sally Stephens

  • 1Institute for Ageing and Health, Wolfson Research Centre, Newcastle General Hospital, Newcastle upon Tyne, UK.

Dementia and Geriatric Cognitive Disorders
|June 5, 2003
PubMed
Abstract

Insights

Early stroke survivors show cognitive deficits linked to white matter changes and frontal atrophy. These MRI findings correlate with attention and executive function impairments, offering insights into post-stroke cognitive decline.

Area of Science:

  • Neuroimaging
  • Neurology
  • Cognitive Science

Background:

  • Stroke survivors often experience early cognitive deficits.
  • Ageing-associated cognitive decline (AACD) is prevalent in older stroke patients.
  • Understanding the neuroanatomical basis of these deficits is crucial.

Purpose of the Study:

  • To determine MRI correlations of early neuropsychological deficits post-stroke.
  • To investigate the relationship between white matter hyperintensities (WMH) and cognitive function.
  • To identify brain structures associated with cognitive decline in stroke survivors.

Main Methods:

  • Neuropsychological assessments of attention and working memory in 50 stroke survivors (>75 years) and 15 controls.
  • MRI scans using a 1.5-tesla scanner.
  • Assessment of white matter hyperintensities (WMH) and grey matter volumes via voxel-based morphometry.

Main Results:

  • Processing speed and executive function deficits correlated with WMH severity in specific brain regions.
  • Atrophy in fronto-subcortical circuits was associated with ageing-associated cognitive decline (AACD).

Conclusions:

  • Attentional and executive impairments are linked to WMH within fronto-striato-thalamo-frontal circuits.
  • Frontal lobe atrophy represents a novel substrate for cognitive decline in stroke patients.

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