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Dynamics of infant white matter maturation from birth to 6 months

  • 0Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, GA, USA.
Biorxiv : the Preprint Server for Biology +

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February 24, 2025

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February 24, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

This study maps infant white matter development from birth to 6 months, revealing rapid early growth that slows significantly over time. Understanding these white matter trajectories is crucial for infant neurodevelopmental research.

Area Of Science

  • Neuroscience
  • Developmental Biology
  • Medical Imaging

Background

  • The first six months post-birth represent a critical period of rapid postnatal change and brain development.
  • Longitudinal data on white matter maturation during this early period is limited, hindering understanding of infant neurodevelopment.

Purpose Of The Study

  • To characterize the longitudinal trajectories of white matter maturation in infants from birth to six months.
  • To investigate the influence of gestational age on early white matter growth patterns.

Main Methods

  • Utilized densely sampled diffusion tensor imaging (DTI) with scans acquired approximately every 1.55 days.
  • Analyzed non-linear growth and growth rate trajectories of major white matter tracts.
  • Compared white matter maturation between infants of different gestational ages, controlling for chronological age.

Main Results

  • Observed significantly faster white matter growth rates at birth (6-11 times faster than at 6 months).
  • Found that tracts with less maturity at birth exhibited the fastest growth rates.
  • Demonstrated that while shorter gestation infants had less mature white matter initially, their growth trajectories normalized when corrected for gestational age.

Conclusions

  • This study provides the first dense longitudinal mapping of white matter development in the first six months of life.
  • Findings highlight the rapid, non-linear nature of early white matter maturation.
  • These detailed trajectories can serve as a normative reference for studying infant neurodevelopmental disorders.

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