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

ABSTRACTBACKGROUND AND PURPOSEThe complex function of memory has been linked to both brain gray and white matter (WM). WM abnormalities are associated with memory impairment in pathological conditions. We investigated whether variation in WM microstructure in healthy children also correlates with memory performance.METHODSSixty ‐five 7.5 to 8.5‐year‐old healthy children had a brain MRI scan using diffusion tensor imaging (DTI). They were also assessed for memory performance using the Children's Memory Scale (CMS). Eight indices that evaluate verbal and visual memory (immediate and delayed) were measured. DTI paramete rs reflecting WM microstructure, including fractional anisotropy (FA), mean diffusivity (MD), radial diffusivity (RD), and axial diffusivity (AD), were calculated and correlated with memory indices.RESULTSTract ‐based spatial statistics analysis showed multiple WM tracts in which DTI parameters correlated with CMS indices. Specifically, FA (a reflection of WM integrity) and RD values (a reflection of myelination) in multiple projecting, association, and commissural WM tracts correlated with verbal delaye d index (P 
Source: Journal of Neuroimaging - Category: Radiology Authors: Tags: Clinical Investigative Study Source Type: research

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