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Related Experiment Videos

Diffusion tensor imaging of the developing human cerebrum.

Rakesh K Gupta1, Khader M Hasan, Richa Trivedi

  • 1Department of Radiology Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India.

Journal of Neuroscience Research
|June 3, 2005
PubMed
Summary
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Diffusion tensor imaging reveals early brain development changes. Fractional anisotropy increases with gestational age, indicating neuronal migration and cortical maturation, with early signs of brain lateralization.

Area of Science:

  • Neuroscience
  • Developmental Biology
  • Medical Imaging

Background:

  • Understanding early human brain development is crucial for identifying potential neurological disorders.
  • Diffusion tensor imaging (DTI) allows for in vivo assessment of white matter microstructure.

Purpose of the Study:

  • To investigate changes in brain microstructure during early fetal development using DTI.
  • To correlate microstructural changes with gestational age and identify early markers of neuronal migration and cortical maturation.

Main Methods:

  • DTI was performed on 15 fetuses and 5 term infants across various gestational ages.
  • Regional cortical fractional anisotropy (FA) values and germinal matrix FA values were analyzed.
  • Statistical analysis was used to assess correlations between FA values and gestational age, and differences between hemispheres.

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Main Results:

  • Cortical FA values increased from 15 to 28 weeks gestational age, then decreased by 36 weeks.
  • A significant inverse correlation was found between gestational age and germinal matrix FA values (r = -0.81, P = 0.004).
  • Significant differences in FA values between right and left frontal cortices suggest early cortical lateralization (P = 0.007).

Conclusions:

  • DTI-derived anisotropy can track neuronal migration and cortical maturation during early development.
  • Observed FA changes in the germinal matrix correlate with gestational age.
  • Early cortical lateralization is detectable using DTI during fetal development.