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Probing the Brain in Autism Using fMRI and Diffusion Tensor Imaging

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Microstructural abnormalities in language and limbic pathways in orphanage-reared children: a diffusion tensor

Ajay Kumar¹, Michael E Behen, Piti Singsoonsud

¹1Carmen and Ann Adams Department of Pediatrics, Children's Hospital of Michigan, Detroit, MI, USA.

Journal of Child Neurology

|January 30, 2013

Summary

This summary is machine-generated.

Children with early institutional deprivation show abnormal white matter development in brain regions crucial for language and behavior. These changes in the arcuate fasciculus and cingulum are linked to deprivation duration and recovery time.

Keywords:

diffusion tensor imaging fiber tractography neuroimaging orphans white matter

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Area of Science:

Neuroscience
Developmental Psychology
Medical Imaging

Background:

Early life adversity, such as institutional deprivation, can significantly impact neurodevelopment.
Limbic and paralimbic white matter tracts are critical for emotional regulation, behavior, and cognitive functions.
Diffusion tensor imaging (DTI) is a powerful tool for assessing white matter microstructure.

Purpose of the Study:

To investigate the microstructural integrity of limbic and paralimbic white matter tracts in children with a history of early institutional deprivation.
To compare white matter integrity between children with early deprivation and typically developing controls.
To explore the relationship between white matter abnormalities, functional outcomes, and environmental factors.

Main Methods:

Diffusion tensor imaging (DTI) fiber tractography was used to analyze white matter integrity.
Participants included 36 children with histories of early institutional deprivation and 16 typically developing controls.
Measures included mean diffusivity (MD) and fractional anisotropy (FA) to assess white matter microstructure.

Main Results:

Children with early deprivation exhibited increased mean diffusivity in the arcuate fasciculus and uncinate fasciculus.
Reduced fractional anisotropy and increased mean diffusivity were observed in the cingulum of children with early deprivation.
Microstructural integrity of specific tracts correlated with language and behavioral functioning, and was associated with duration of deprivation and time post-adoption.

Conclusions:

Early institutional deprivation is associated with widespread white matter abnormalities in limbic and paralimbic pathways.
Specific white matter tracts, including the arcuate fasciculus and cingulum, show differential susceptibility to early deprivation.
These findings highlight the long-term neurobiological consequences of early adversity and the potential for recovery.