Specific relations between neurodevelopmental abilities and white matter microstructure in children born preterm

Serena J Counsell1, A David Edwards, Andrew T M Chew

  • 1Imaging Sciences Department, Robert Steiner MR Unit, Imperial College London, Hammersmith Hospital, London, UK. serena.counsell@imperial.ac.uk

Insights

Preterm birth survivors with normal MRIs show impaired neurodevelopment linked to white matter microstructure changes. Fractional anisotropy (FA) in specific brain areas predicts developmental quotient (DQ) and sub-scores, aiding prognostication.

Area of Science:

  • Neuroscience
  • Developmental Pediatrics
  • Radiology

Background:

  • Preterm birth survivors often experience neurodevelopmental impairments not fully explained by conventional brain imaging.
  • Conventional MRI may not detect subtle white matter abnormalities impacting neurodevelopment.

Purpose of the Study:

  • To investigate the relationship between white matter microstructure and neurodevelopmental outcomes in preterm infants without focal brain abnormalities.
  • To test if local changes in white matter microstructure, measured by fractional anisotropy (FA), correlate with neurodevelopmental abilities at 2 years corrected age.

Main Methods:

  • Diffusion tensor imaging (DTI) was used to measure FA in 33 preterm children at a median corrected age of 25.5 months.
  • Neurodevelopmental assessment was performed using the Griffiths Mental Development Scales, yielding a developmental quotient (DQ) and sub-scores.
  • Tract-based spatial statistics and linear regression analyzed the correlation between FA values and DQ/sub-scores.

Main Results:

  • Overall developmental quotient (DQ) showed a linear relationship with FA in specific regions of the corpus callosum.
  • Performance and eye-hand coordination sub-scores correlated with FA in various white matter tracts, including the corpus callosum, cingulum, fornix, anterior commissure, and uncinate fasciculus.
  • These findings indicate precise relationships between microstructural abnormalities and specific neurodevelopmental deficits.

Conclusions:

  • Specific neurodevelopmental impairments in preterm infants are precisely linked to consistent, localized white matter microstructural abnormalities.
  • Fractional anisotropy (FA) shows potential as a biomarker for prognostication and guiding therapeutic interventions in preterm brain injury.

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