Effect of antenatal growth and prematurity on brain white matter: diffusion tensor study

Area of Science:

• Neuroscience
• Developmental Biology
• Medical Imaging

Background:

• White matter maturation involves increasing fractional anisotropy (FA) and decreasing mean diffusivity (MD).
• Previous studies on premature birth's effect on white matter maturation at term-equivalent age have yielded conflicting results.

Purpose of the Study:

• To investigate the relationship between gestational age and low birth weight-for-gestational-age z-score and white matter maturation.
• To assess diffusion parameters in white matter regions at term-equivalent age.

Main Methods:

• Diffusion tensor imaging (DTI) was performed on 76 infants at term-equivalent age.
• Gestational age and birth weight z-score were analyzed as continuous variables.
• Regions-of-interest analysis was used to evaluate white matter maturation in specific brain areas.

Main Results:

• Gestational age did not significantly affect white matter maturation at term-equivalent age.
• Low birth weight z-score was associated with reduced FA in the genu and splenium of the corpus callosum.
• Low birth weight z-score was linked to increased MD in the splenium of the corpus callosum.

Conclusions:

• Children with low birth weight relative to gestational age demonstrate delayed or anomalous white matter maturation.
• Birth weight is a significant factor influencing white matter development in preterm infants.