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Related Concept Videos

Brain Imaging01:14

Brain Imaging

Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).

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Probing the Brain in Autism Using fMRI and Diffusion Tensor Imaging
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Published on: September 12, 2011

Diffusion tensor imaging-based characterization of brain neurodevelopment in primates.

Yundi Shi1, Sarah J Short, Rebecca C Knickmeyer

  • 1Department of Psychiatry, University of North Carolina, Chapel Hill, NC 27599-7160, USA. yundiuu@gmail.com

Cerebral Cortex (New York, N.Y. : 1991)
|January 26, 2012
PubMed
Summary
This summary is machine-generated.

This study maps primate brain development using diffusion tensor imaging (DTI) in rhesus monkeys aged 1-6 years. Findings reveal age-related changes in white and gray matter, offering insights into neurodevelopmental processes.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Medical Imaging

Background:

  • Primate neuroimaging is vital for understanding neurodevelopment.
  • Lack of normative primate brain data hinders human comparison.
  • Diffusion tensor imaging (DTI) offers insights into white matter microstructure.

Purpose of the Study:

  • To establish a normative description of primate brain development using DTI.
  • To characterize age-related changes in DTI properties in rhesus monkeys.
  • To compare primate neurodevelopmental patterns with human studies.

Main Methods:

  • Cross-sectional DTI study on 25 healthy rhesus monkeys (1-6 years old).
  • Region-of-interest, voxel-wise, and fiber tract-based analyses were performed.
  • Evaluated changes in fractional anisotropy (FA), mean diffusivity, axial diffusivity (AD), and radial diffusivity (RD).

Main Results:

  • Significant age-related changes in DTI properties were observed across brain regions and fiber tracts.
  • White matter showed increased FA and AD, and decreased RD; gray matter exhibited similar but smaller changes.
  • A posterior-to-anterior developmental trend and strong correlations between white and gray matter development were found.

Conclusions:

  • DTI provides crucial insights into primate brain maturation, including myelination and axonal changes.
  • Observed patterns largely mirror human neurodevelopment, with some unique primate-specific trends.
  • This study establishes a foundational normative dataset for primate brain development.