Mostrando 3,281 - 3,300 Resultados de 79,334 Para Buscar '"matter"', tiempo de consulta: 1.91s Limitar resultados
  1. 3281
  2. 3282
    “…Together, the time-courses of R1 and diffusion changes demonstrate that multiple biological processes drive changes in white matter tissue properties over the lifespan.…”
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  3. 3283
    “…Sporadic Creutzfeldt-Jakob disease is considered primarily a disease of grey matter, although the extent of white matter involvement has not been well described. …”
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  4. 3284
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  6. 3286
    “…Comparing diffusivity metrics, optimal overall separation of the bvFTD group from the healthy control group was signalled using radial diffusivity, whereas optimal overall separation of the bvFTD group from the Alzheimer's disease group was signalled using fractional anisotropy. Comparing white matter changes with regional grey matter atrophy (delineated using voxel based morphometry) in the bvFTD cohort revealed co‐localisation between modalities particularly in the anterior temporal lobe, however white matter changes extended widely beyond the zones of grey matter atrophy. …”
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  7. 3287
  8. 3288
    “…Here we aimed to use a data‐driven technique to parcellate developing white matter into regions with consistent white matter growth trajectories and investigate how these regions related to cognitive development. …”
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  9. 3289
  10. 3290
    “…Although most of the studies found gray matter (GM) volumes reduced in some brain regions in CFS, there are many factors that could affect GM volumes in CFS, including chronic pain, stress, psychiatric disorder, physical activity, and insomnia, which may bias the results. …”
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  11. 3291
    por Wharton, Samuel, Bowtell, Richard
    Publicado 2015
    “…PURPOSE: To investigate the effects on quantitative susceptibility mapping (QSM) and susceptibility tensor imaging (STI) of the frequency variation produced by the microstructure of white matter (WM). METHODS: The frequency offsets in a WM tissue sample that are not explained by the effect of bulk isotropic or anisotropic magnetic susceptibility, but rather result from the local microstructure, were characterized for the first time. …”
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  12. 3292
    por Kroes, Rob
    Publicado 2015
    “…If deficits, nor defaults, don’t really matter anymore, what sign of our times is it? What has changed from the days that Franklin Delano Roosevelt risked the fragile economic recovery from the great depression by returning, in 1937, to the standard of his economic orthodoxy, a belief in fiscal rectitude and anaversion to debts and deficits? …”
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  13. 3293
  14. 3294
    “…We use cross-validation to assess model-accuracy at different gradient amplitudes (b-values) throughout the white matter. Specifically, we fit each model to all the white matter voxels in one data set and then use the model to predict a second, independent data set. …”
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  18. 3298
    “…Convergent genetic, postmortem, behavioral and neuroimaging evidence suggests abnormalities in the development of frontotemporal white matter (WM) in the pathophysiology of BD. This review discusses evidence for the involvement of abnormal WM development in BD during adolescence, with a focus on frontotemporal WM. …”
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  19. 3299
    por Yang, Wen-Juan, Wang, Xiang-Bin
    Publicado 2015
    “…We propose a scheme to realize heralded quantum entanglement between two distant matter qubits using two Λ atom systems. Our proposal does not need any photon interference. …”
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