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Working memory (WM) is particularly important for higher cognitive tasks. Previous studies have shown that there are several brain networks under WM task or training, however, it is still unknown how many networks are involved in WM. In this paper, we utilize the method of modularity in the graph theory to explore the module distribution and the degree of coupling of the brain network under the real-time...
Real time functional magnetic resonance imaging (rtfMRI) allows capturing and analyzing the image of brain activity instantly by measuring the blood oxygen level-dependent (BOLD) signal. Based on rtfMRI, it could provide on-line feedback of human subjects to learn self-regulation of physiological processes, which had shown significant and potential applications in many conducted researches. With the...
Diffusion tensor imaging (DTI) is a magnetic resonance imaging technique that can estimate the directionality of fibers and the microstructural of white matter in human brain. DTI researches have demonstrated that demyelinations existed in white matter of Alzheimer's disease (AD) patients mainly by fractional anisotropy (FA) and apparent diffusion constant (ADC). FA or ADC is usually used to reveal...
The recently developed magnetic resonance imaging technique of diffusion tensor imaging (DTI) has a widespread application on investigating the cerebral white matter architecture. When referred to fiber tracking, as the typical application of DTI, one of the most intuitive ways to reconstruct fiber trajectory is streamline tracking, (STT). Regarding the problems from noise and discrete tensor field...
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