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Updated: Aug 6, 2026
Fabrication of an Expandable Brain Matrix Customizable Across Developmental Stages
Published on: February 20, 2026
White and gray matter development in human fetal, newborn and pediatric brains
Hao Huang1, Jiangyang Zhang, Setsu Wakana
1Department of Radiology, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD 21205, USA.
Insights
This study maps white matter tract development in human brains from fetal to childhood stages using diffusion tensor imaging. Findings reveal distinct developmental timelines for limbic, association, commissural, and projection tracts, aiding understanding of brain development and injuries.
Area of Science:
- Neuroscience
- Developmental Biology
- Medical Imaging
Background:
- Human brain development, particularly white matter growth, is crucial but poorly documented during late gestation and early infancy.
- Understanding white matter development is key to deciphering the causes of white matter injuries in conditions like cerebral palsy.
- Recent advancements in histology and imaging offer new possibilities for studying early brain anatomy.
Purpose of the Study:
- To characterize the normal axonal growth of white matter tracts during human brain development.
- To create a 3D reference dataset of brain development using diffusion tensor imaging.
- To establish developmental timelines for different white matter tracts and gray matter structures.
Main Methods:
- Acquisition of diffusion tensor magnetic resonance imaging (DTI) data from postmortem fetal brains, neonates, and children.
- Annotation, segmentation, measurement, and 3D reconstruction of neural structures from DTI data.
- Quantitative evaluation and comparison of white matter tract growth across different developmental stages (fetal, neonatal, childhood).
Main Results:
- Detailed 3D reconstructions and quantitative characterizations of limbic, commissural, association, and projection white matter tracts.
- Established developmental timelines showing limbic fibers develop earliest, followed by commissural and projection fibers (anterior to posterior), with association fibers developing last.
- Demonstrated significant dynamic changes in white matter tract growth from fetal to childhood stages.
Conclusions:
- The study provides a valuable 3D resource of human brain development based on DTMRI.
- The characterized developmental patterns offer reference standards for diagnostic radiology, especially for premature newborns.
- This research enhances our understanding of normal brain maturation and provides a basis for investigating developmental abnormalities.
Abstract:
Brain anatomy is characterized by dramatic growth from the end of the second trimester through the neonatal stage. The characterization of normal axonal growth of the white matter tracts has not been well-documented to date and could provide important clues to understanding the extensive inhomogeneity of white matter injuries in cerebral palsy (CP) patients. However, anatomical studies of human brain development during this period are surprisingly scarce and histology-based atlases have become available only recently. Diffusion tensor magnetic resonance imaging (DTMRI) can reveal detailed anatomy of white matter. We acquired diffusion tensor images (DTI) of postmortem fetal brain samples and in vivo neonates and children. Neural structures were annotated in two-dimensional (2D) slices, segmented, measured, and reconstructed three-dimensionally (3D). The growth status of various white matter tracts was evaluated on cross-sections at 19-20 gestational weeks, and compared with 0-month-old neonates and 5- to 6-year-old children. Limbic, commissural, association, and projection white matter tracts and gray matter structures were illustrated in 3D and quantitatively characterized to assess their dynamic changes. The overall pattern of the time courses for the development of different white matter is that limbic fibers develop first and association fibers last and commissural and projection fibers are forming from anterior to posterior part of the brain. The resultant DTMRI-based 3D human brain data will be a valuable resource for human brain developmental study and will provide reference standards for diagnostic radiology of premature newborns.
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