![]() Diffusion tensor imaging maps were analyzed using standardized parcellation methods. Diffusion tensor imaging and neuropsychological assessments were conducted in 79 healthy, right-handed youth aged 4-17 years. The neural correlates of these dimensions were investigated within corona radiata subregions in healthy youth. Mirsky proposed a model of attention that included these dimensions: focus/execute, sustain, stabilize, encode, and shift. Stave, Elise A De Bellis, Michael D Hooper, Steven R Woolley, Donald P Chang, Suk Ki Chen, Steven D PMID:21542942ĭimensions of Attention Associated With the Microstructure of Corona Radiata White Matter. MRS may reveal the progressive course of damage in the ipsilateral thalamus over time. Conclusions These findings indicate that DTI and MRS can detect the early changes indicating secondary damage in the ipsilateral thalamus after unilateral corona radiata infarction. Spearman's rank correlation analysis revealed a significant negative correlation between MD and the peak area of NAA, Cho, and Cr at W1, W4, and W12 and a significant positive correlation of FA with NAA at W1. There was no significant change in FA, Cho, or Cr in the ipsilateral thalamus from W1 to W12. NAA was significantly decreased at W4 compared to W1, and at W12 compared to W4 (all P< 0.05) in the ipsilateral thalamus. In patients, MD was significantly increased at W12, compared to W1 and W4 (all P< 0.05). Results T1-weighted fluid attenuation inversion recovery (FLAIR), T2-weighted, and T2-FLAIR imaging showed an infarct at unilateral corona radiate but no other lesion in each patient brain. Mean diffusivity (MD), fractional anisotropy (FA), N-acetylaspartate (NAA), choline(Cho), and creatine(Cr) were measured in thalami. Methods Twelve patients with unilateral corona radiata infarction underwent MR imaging including DTI and MRS at one week (W1), four weeks (W4), and twelve weeks (W12) after onset of stroke. In this study, We used both DTI and MRS to examine possible secondary damage of thalamus in patients with corona radiata infarction. Diffusion tensor imaging (DTI) and proton magnetic resonance spectroscopy (MRS) are potentially sensitive and quantitative methods of detection in examining changes of tissue microstructure and metabolism. However, it is difficult to demonstrate these early changes quantitatively. Early detection of secondary damage in ipsilateral thalamus after acute infarction at unilateral corona radiata by diffusion tensor imaging and magnetic resonance spectroscopyīackground Traditional magnetic resonance (MR) imaging can identify abnormal changes in ipsilateral thalamus in patients with unilateral middle cerebral artery (MCA) infarcts.
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