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   Articles with "bold signal" as a keyword



Coherence of BOLD signal and electrical activity in the human brain during deep sevoflurane anesthesia

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recommendations! Published in 2017 at "Brain and Behavior"

DOI: 10.1002/brb3.679

Abstract: Changes in neural activity induce changes in functional magnetic resonance (fMRI) blood oxygenation level dependent (BOLD) signal. Commonly, increases in BOLD signal are ascribed to cellular excitation. read more here.

Keywords: electrical activity; bold signal; coherence bold; signal electrical ... See more keywords

Frequency‐dependent tACS modulation of BOLD signal during rhythmic visual stimulation

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recommendations! Published in 2018 at "Human Brain Mapping"

DOI: 10.1002/hbm.23990

Abstract: Transcranial alternating current stimulation (tACS) has emerged as a promising tool for modulating cortical oscillations. In previous electroencephalogram (EEG) studies, tACS has been found to modulate brain oscillatory activity in a frequency‐specific manner. However, the… read more here.

Keywords: modulation; frequency; stimulation; rhythmic visual ... See more keywords

Altered basal forebrain BOLD signal variability at rest in posttraumatic stress disorder: A potential candidate vulnerability mechanism for neurodegeneration in PTSD

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recommendations! Published in 2021 at "Human Brain Mapping"

DOI: 10.1002/hbm.25454

Abstract: Individuals with posttraumatic stress disorder (PTSD) are at increased risk for the development of various forms of dementia. Nevertheless, the neuropathological link between PTSD and neurodegeneration remains unclear. Degeneration of the human basal forebrain constitutes… read more here.

Keywords: seed; neurodegeneration; bold signal; basal forebrain ... See more keywords

A randomized, placebo-controlled, phase 1 study to evaluate the effects of TAK-063 on ketamine-induced changes in fMRI BOLD signal in healthy subjects

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recommendations! Published in 2019 at "Psychopharmacology"

DOI: 10.1007/s00213-019-05366-1

Abstract: Rationale Phosphodiesterase 10A inhibitor TAK-063 has shown effects that suggest efficacy in schizophrenia treatment. Objective This randomized, double-blind, placebo-controlled, incomplete-crossover study investigated effects of single oral administration of TAK-063 on ketamine-induced changes in blood oxygen… read more here.

Keywords: fmri bold; ketamine induced; bold signal; placebo ... See more keywords

Effects of Ketamine and Midazolam on Simultaneous EEG/fMRI Data During Working Memory Processes.

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recommendations! Published in 2021 at "Brain topography"

DOI: 10.1007/s10548-021-00876-8

Abstract: Reliable measures of cognitive brain activity from functional neuroimaging techniques may provide early indications of efficacy in clinical trials. Functional magnetic resonance imaging and electroencephalography provide complementary spatiotemporal information and simultaneous recording of these two… read more here.

Keywords: theta; effects ketamine; bold signal; midazolam simultaneous ... See more keywords

Creative, internally-directed cognition is associated with reduced BOLD variability

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recommendations! Published in 2020 at "NeuroImage"

DOI: 10.1016/j.neuroimage.2020.116758

Abstract: In a range of externally-directed tasks, intra-individual variability of fMRI BOLD signal has been shown to be a stronger predictor of cognitive performance than mean BOLD signal. BOLD variability's strong association with cognitive performance is… read more here.

Keywords: internally directed; bold variability; directed cognition; variability ... See more keywords
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The coupling of BOLD signal variability and degree centrality underlies cognitive functions and psychiatric diseases

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recommendations! Published in 2021 at "NeuroImage"

DOI: 10.1016/j.neuroimage.2021.118187

Abstract: Brain signal variability has been consistently linked to functional integration; however, whether this coupling is associated with cognitive functions and/or psychiatric diseases has not been clarified. Using multiple multimodality datasets, including resting-state functional magnetic resonance… read more here.

Keywords: functional integration; cognitive functions; variability; bold signal ... See more keywords

Task-evoked metabolic demands of the posteromedial default mode network are shaped by dorsal attention and frontoparietal control networks

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recommendations! Published in 2022 at "eLife"

DOI: 10.1101/2022.08.12.503715

Abstract: Although BOLD signal decreases in the default mode network (DMN) are commonly observed during attention-demanding tasks, their neurobiological underpinnings are not fully understood. Previous work has shown decreases but also increases in glucose metabolism that… read more here.

Keywords: network; glucose metabolism; mode network; bold signal ... See more keywords

Altered Blood Oxygen Level-Dependent Signal Stability in the Brain of Patients with Major Depressive Disorder Undergoing Resting-State Functional Magnetic Resonance Imaging

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recommendations! Published in 2024 at "Neuropsychobiology"

DOI: 10.1159/000541720

Abstract: Abstract Introduction: Major depressive disorder (MDD) is a common, relapse-prone psychiatric disorder with unknown pathogenesis. Previous studies on resting-state functional magnetic resonance imaging of MDD have mostly focused on the spontaneous activity of blood oxygen… read more here.

Keywords: signal stability; state functional; resting state; stability ... See more keywords

Temporal fractal analysis of the rs-BOLD signal identifies brain abnormalities in autism spectrum disorder

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recommendations! Published in 2017 at "PLoS ONE"

DOI: 10.1371/journal.pone.0190081

Abstract: Background Brain connectivity in autism spectrum disorders (ASD) has proven difficult to characterize due to the heterogeneous nature of the spectrum. Connectivity in the brain occurs in a complex, multilevel and multi-temporal manner, driving the… read more here.

Keywords: analysis; connectivity; bold signal; signal complexity ... See more keywords

Resting-state neural signal variability in women with depressive disorders

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recommendations! Published in 2022 at "Behavioural Brain Research"

DOI: 10.2139/ssrn.4052510

Abstract: Aberrant activity and connectivity in default mode (DMN), frontoparietal (FPN), and salience (SN) network regions is well-documented in depression. Recent neuroimaging research suggests that altered variability in the blood oxygen level-dependent (BOLD) signal may disrupt… read more here.

Keywords: signal variability; depression; variability; resting state ... See more keywords