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Related Experiment Video

Updated: Jul 9, 2026

Evaluation of the Cognitive Performance of Hypertensive Patients with Silent Cerebrovascular Lesions
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Threshold Effects, Cognitive Decline, and Longitudinal Changes in White Matter Hyperintensity Volume.

Sarvin Sasannia1,2, Mykola Matsyuk3, Shimeng Wang4

  • 1Department of Neurology (S.S., R.L., L.K., P.A.N.)Johns Hopkins University School of Medicine, Baltimore, MD.

Stroke
|July 8, 2026
PubMed
Summary
This summary is machine-generated.

Changes in white matter hyperintensity (WMH) volume accelerate cognitive decline beyond specific thresholds, with periventricular WMHs showing greater impact than deep WMHs.

Keywords:
cerebral small vessel diseasescognitionischemic strokelinear modelsprocessing speed

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Area of Science:

  • Neurology
  • Neuroimaging
  • Cognitive Science

Background:

  • Ischemic white matter hyperintensity (WMH) volume changes correlate with cognitive decline.
  • Investigating threshold effects of WMH volume on cognition is crucial.

Purpose of the Study:

  • To determine if changes in WMH volume exhibit threshold effects on cognitive decline.
  • To compare these effects between deep WMHs (DWMHs) and periventricular WMHs (PVWMHs).

Main Methods:

  • Longitudinal study of 339 participants with MRI and neuropsychological testing.
  • Used two-segment linear spline regression to identify cognitive decline thresholds.
  • Classified WMHs as PVWMH or DWMH and analyzed them as time-varying predictors.

Main Results:

  • Cognitive decline accelerated beyond specific WMH volume thresholds.
  • PVWMHs and DWMHs showed significant effects on motor function and processing speed above thresholds.
  • Digit symbol substitution test showed paradoxical effects below thresholds, reversing to decline above.

Conclusions:

  • WMH volume changes have nonlinear threshold effects on cognitive performance.
  • PVWMHs have a greater impact on cognitive decline, especially motor and processing speed, compared to DWMHs.