Arterial blood stealing as a mechanism of negative BOLD response: From the steady-flow with nonlinear phase separation to a windkessel-based model.
Sign Up to like & getrecommendations! Published in 2021 at "Journal of theoretical biology"
DOI: 10.1016/j.jtbi.2021.110856
Abstract: Blood Oxygen Level Dependent (BOLD) signal indirectly characterizes neuronal activity by measuring hemodynamic and metabolic changes in the nearby microvasculature. A deeper understanding of how localized changes in electrical, metabolic and hemodynamic factors translate into… read more here.
Keywords: negative bold; response; model; blood ... See more keywords
Structural impacts on the timing and amplitude of the negative BOLD response.
Sign Up to like & getrecommendations! Published in 2018 at "Magnetic resonance imaging"
DOI: 10.1016/j.mri.2017.09.007
Abstract: The positive (PBR) and negative BOLD responses (NBR) arising in task-fMRI display varying magnitudes and dynamics across voxels. While the effects of structure, particularly of veins, on the PBR have been studied, little is known… read more here.
Keywords: negative bold; structural impacts; pbr nbr; structure ... See more keywords
Task-evoked Negative BOLD Response and Functional Connectivity in the Default Mode Network are Representative of Two Overlapping but Separate Neurophysiological Processes
Sign Up to like & getrecommendations! Published in 2019 at "Scientific Reports"
DOI: 10.1038/s41598-019-50483-8
Abstract: The topography of the default mode network (DMN) can be obtained with one of two different functional magnetic resonance imaging (fMRI) methods: either from the spontaneous but organized synchrony of the low-frequency fluctuations in resting-state… read more here.
Keywords: negative bold; default mode; connectivity; dmn ... See more keywords