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White Matter Microstructure Correlates with Memory Performance in Healthy Children: A Diffusion Tensor Imaging Study.

Amjad Samara1,2, Kaiyang Feng3, R Terry Pivik1,2

  • 1Arkansas Children's Nutrition Center, Little Rock, AR.

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Summary
This summary is machine-generated.

Brain white matter (WM) integrity and myelination in healthy children correlate with memory performance. Diffusion tensor imaging (DTI) reveals these subtle WM variations are linked to memory function, even in the normal range.

Keywords:
Children's memory scaleTBSSdiffusion tensor imagingwhite matter

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Area of Science:

  • Neuroimaging
  • Cognitive Neuroscience
  • Developmental Neuroscience

Background:

  • Memory function is intricately linked to both gray and white matter (WM) in the brain.
  • Abnormalities in WM are frequently associated with memory impairments in various pathological conditions.
  • The relationship between WM microstructure and memory performance in healthy children remains an area of active investigation.

Purpose of the Study:

  • To investigate the correlation between WM microstructure variations and memory performance in healthy children.
  • To determine if neuroimaging techniques can detect subtle WM changes related to normal memory function variations.
  • To explore the association between diffusion tensor imaging (DTI) parameters and specific memory indices.

Main Methods:

  • Sixty-five healthy children (7.5–8.5 years old) underwent brain MRI using DTI.
  • Memory performance was assessed using the Children's Memory Scale (CMS), measuring eight verbal and visual memory indices.
  • DTI parameters (fractional anisotropy [FA], mean diffusivity [MD], radial diffusivity [RD], axial diffusivity [AD]) were calculated and correlated with memory indices.

Main Results:

  • Tract-based spatial statistics revealed significant correlations between DTI parameters and CMS indices across multiple WM tracts.
  • FA (WM integrity) and RD (myelination) in various WM tracts correlated with delayed verbal memory.
  • FA in specific tracts, including the superior longitudinal fasciculus, correlated positively with delayed recognition memory.

Conclusions:

  • Neuroimaging, specifically DTI, can sensitively detect brain WM changes associated with variations in memory function in healthy children.
  • These findings suggest that WM microstructure plays a crucial role in memory performance, even within the normal range.
  • The study highlights the potential of DTI for understanding the neural underpinnings of memory development.