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Ex utero Electroporation and Whole Hemisphere Explants: A Simple Experimental Method for Studies of Early Cortical Development
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Infants' cortex undergoes microstructural growth coupled with myelination during development.

Vaidehi S Natu1, Mona Rosenke2, Hua Wu3

  • 1Department of Psychology, Stanford University, Stanford, CA, 94305, USA. vnatu@stanford.edu.

Communications Biology
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Summary
This summary is machine-generated.

Infants' brains show significant microstructural growth in the first six months, driven by myelination and synaptic development. This developmental pattern in the visual cortex challenges previous assumptions about brain maturation rates.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Medical Imaging

Background:

  • Cortical development in infancy is crucial for brain function.
  • The microstructural development of the infant cortex is not well understood.

Purpose of the Study:

  • To investigate the longitudinal development of cortical microstructure in infants from birth to six months.
  • To identify the biological mechanisms driving postnatal cortical growth.

Main Methods:

  • Longitudinal multimodal quantitative imaging of cortical microstructure.
  • Comparison of in vivo imaging data with ex vivo transcriptomic data.
  • Analysis of visual cortex development as a model system.

Main Results:

  • Infants' cortex exhibits substantial microstructural tissue growth during the first six months.
  • Myelination and synaptic processes are key contributors to this growth.
  • Hierarchical microstructural growth observed in the visual cortex, with higher-level areas maturing faster postnatally.

Conclusions:

  • Cortical myelination is a critical factor in early infant brain development.
  • Findings challenge the notion that areas mature fastest at birth develop quickest.
  • Results have implications for diagnosing neurodevelopmental disorders and delays.