Dynamic BOLD functional connectivity in humans and its electrophysiological correlates
نویسندگان
چکیده
منابع مشابه
Dynamic BOLD functional connectivity in humans and its electrophysiological correlates
Neural oscillations subserve many human perceptual and cognitive operations. Accordingly, brain functional connectivity is not static in time, but fluctuates dynamically following the synchronization and desynchronization of neural populations. This dynamic functional connectivity has recently been demonstrated in spontaneous fluctuations of the Blood Oxygen Level-Dependent (BOLD) signal, measu...
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Spontaneous fluctuations of the BOLD (Blood Oxygen Level-Dependent) signal, measured with fMRI (functional Magnetic Resonance Imaging), display a rich and neurobiologically relevant functional connectivity structure. This structure is usually revealed using time averaging methods, which prevent the detection of functional connectivity changes over time. It has been recently shown that functiona...
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Recent resting-state fMRI studies have shown that the apparent functional connectivity (FC) between brain regions may undergo changes on time-scales of seconds to minutes, the basis and importance of which are largely unknown. Here, we examine the electrophysiological correlates of within-scan FC variations during a condition of eyes-closed rest. A sliding window analysis of simultaneous EEG-fM...
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Introduction Temporal correlation of BOLD signal has been observed between remote cerebral areas even in the absence of task performing (1). Such correlation is commonly believed to be neuronal and reflect the functional connectivity or default mode of the brain. Known as a vessel contractor, caffeine has been found effective in modulating the hemodynamic response in task-based BOLD fMRI (2). A...
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Electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) are important tools in cognitive and clinical neuroscience. Combined EEG-fMRI has been shown to help to characterise brain networks involved in epileptic activity, as well as in different sensory, motor and cognitive functions. A good understanding of the electrophysiological correlates of the blood oxygen level-depen...
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ژورنال
عنوان ژورنال: Frontiers in Human Neuroscience
سال: 2012
ISSN: 1662-5161
DOI: 10.3389/fnhum.2012.00339