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Cortical morphological changes in stroke-associated dysarthria patients.

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This summary is machine-generated.

Post-stroke dysarthria (DYS) is linked to altered brain structure. Surface-based morphometry revealed increased fractal dimension and gyrification in specific brain regions, correlating with speech impairment severity.

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Area of Science:

  • Neuroimaging
  • Neurology
  • Speech Pathology

Background:

  • Post-stroke dysarthria (DYS) significantly impairs communication.
  • Cortical morphological changes in DYS are not well understood.

Purpose of the Study:

  • To investigate cortical morphological alterations in DYS patients using surface-based morphometry (SBM).
  • To correlate these changes with dysarthria severity measured by the Frenchay Dysarthria Assessment (FDA).

Main Methods:

  • MRI scans were acquired for 48 DYS patients and 72 controls.
  • SBM was used to extract cortical fractal dimension and gyrification.
  • Group differences and correlations with FDA scores were analyzed.

Main Results:

  • DYS patients showed increased fractal dimension in the left insula.
  • Elevated gyrification was observed in bilateral insula, superior temporal, and precentral gyri.
  • Right supramarginal gyrification correlated with FDA reflex and respiration subscores.

Conclusions:

  • Cortical alterations in the insula and supramarginal gyrus may underlie DYS.
  • SBM offers quantitative markers for speech motor control and personalized rehabilitation.