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Slow Endogenous Fluctuations in Cortical Functional Magnetic Resonance Imaging Signals Correlate with Reduced Performance in a Visual Detection Task and Are Suppressed by Spatial Attention
2019
Journal of Cognitive Neuroscience
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Spatial attention improves performance on visual tasks, increases neural responses to attended stimuli, and reduces correlated noise in visual cortical neurons. ...
Instead, perceptual performance was accounted for by the amount of suppression of slow endogenous fluctuations. ...
Slow Endogenous Fluctuations in Cortical fMRI Signals Correlate with Reduced Performance in a Visual Detection Task and Are Suppressed by Spatial Attention David W. ...
doi:10.1162/jocn_a_01470
pmid:31560268
pmcid:PMC6920021
fatcat:x5h72raa4ze6vio33dua2bfley
Natural Scenes Viewing Alters the Dynamics of Functional Connectivity in the Human Brain
2013
Neuron
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We use MEG to measure slow ($0.1 Hz) coherent fluctuations of band-limited power (BLP), a robust correlate of RSN, during rest and movie observation and compare them to fMRI-RSN. ...
Spontaneous fMRI fluctuations are organized in large-scale spatiotemporal structures, or restingstate networks (RSN). However, it is unknown how task performance affects RSN dynamics. ...
signal in the resting state correlate with fluctuations of the slow cortical potentials (SCP) (<4 Hz) and BLP fluctuations of signals at higher frequencies (a, b, and g bands) (He et al., 2008; Nir et ...
doi:10.1016/j.neuron.2013.06.022
pmid:23891400
pmcid:PMC3893318
fatcat:4b4uncgukvegljwvmvmhqty7l4
Neuromodulation of Brain State and Behavior
2020
Annual Review of Neuroscience
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and subcortical-cortical neural pathways. ...
Neural activity and behavior are both notoriously variable, with responses differing widely between repeated presentation of identical stimuli or trials. ...
In one such study, the baseline activity of a higher visual area during a visual search task was found to correlate with the success rate of the monkey and to not be directly related to spatial attention ...
doi:10.1146/annurev-neuro-100219-105424
pmid:32250724
fatcat:prwvmdbyibhyzfflzhbguc6y7y
Posterior parietal cortex controls spatial attention through modulation of anticipatory alpha rhythms
2008
Nature Precedings
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We show that brief interference by transcranial magnetic stimulation (rTMS) with preparatory activity in right IPS or right FEF while subjects attend to a spatial location impairs identification of target ...
A dorsal fronto-parietal network, including regions in intra-parietal sulcus (IPS) and frontal eye field (FEF), has been hypothesized to control the allocation of spatial attention to environmental stimuli ...
of rTMS over IPS and FEF during the endogenous allocation of spatial attention in anticipation of a visual target. ...
doi:10.1038/npre.2008.1563.1
fatcat:p2s5rvi5ofeblot5qfl5ix2qfy
The power of spectral density analysis for mapping endogenous BOLD signal fluctuations
2008
Human Brain Mapping
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Correlations between motor regions also reduced with task performance. ...
The spatial correlations shown by these fluctuations has been their identifying feature, distinguishing them from fluctuations associated with other processes. ...
A recent follow-up study found the amplitude of low-frequency BOLD signal fluctuations in many regions, including the visual, motor, and auditory cortices, to be negatively correlated with wakefulness, ...
doi:10.1002/hbm.20601
pmid:18454458
pmcid:PMC5441229
fatcat:xqvzeo7warc5nnwyxyo2bhsvau
Predictive Coding or Evidence Accumulation? False Inference and Neuronal Fluctuations
2010
PLoS ONE
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We analysed fluctuations in ongoing neural activity, as indexed by fMRI, and found that neuronal activity in sensory areas (extrastriate visual and early auditory cortex) biases perceptual decisions towards ...
In accord with predictive coding models and the free-energy principle, this observation suggests that cortical activity in sensory brain areas reflects the precision of prediction errors and not just the ...
Under predictive coding, this higher sensory noise should suppress the gain of error units and reduce activity levels, accentuating the effect of endogenous fluctuations. ...
doi:10.1371/journal.pone.0009926
pmid:20369004
pmcid:PMC2848028
fatcat:5pz2obphezbg3hq4o7dzxsikz4
Tagged MEG measures binocular rivalry in a cortical network that predicts alternation rate
2019
PLoS ONE
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Binocular rivalry (BR) is a dynamic visual illusion that provides insight into the cortical mechanisms of visual awareness, stimulus selection, and object identification. ...
During BR, event-related monocular input in V1, and broadly in higher-tier ventral temporal cortex, waxed and waned with the periods of left or right eye dominance/suppression. ...
In a previous fMRI study of binocular rivalry [40] , we found that the strength of BOLD signal measured in V2 and V3 was correlated with mean dominance duration across subjects (greater in slow switchers ...
doi:10.1371/journal.pone.0218529
pmid:31295259
pmcid:PMC6622468
fatcat:zewjd6efwzaujis5hv4cr5tbce
Global waves synchronize the brain's functional systems with fluctuating arousal
2021
Science Advances
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Here, using fMRI in humans, we show that ongoing arousal fluctuations are associated with global waves of activity that slowly propagate in parallel throughout the neocortex, thalamus, striatum, and cerebellum ...
We hypothesize that these waves are the predominant physiological process reflected in spontaneous functional magnetic resonance imaging (fMRI) signal fluctuations. ...
Figure 1 illustration was made with assistance from A. Robinson, in association with InPrint at ...
doi:10.1126/sciadv.abf2709
pmid:34290088
fatcat:iyt3rbu54zf3dgik3xtofquu5i
What's New in Neuroimaging Methods?
2009
Annals of the New York Academy of Sciences
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For each area covered, a brief context is provided along with a summary of a few of the current developments and issues. ...
More detail is included on fMRI, as subsections include: functional MRI interpretation, new functional MRI contrasts, MRI technology, MRI paradigms and processing, and endogenous oscillations in functional ...
I also appreciate the administrative assistance of Kay Kuhns and Dorian Van Tassell with regard to obtaining permission from various publishers to use most of the figures in this article. ...
doi:10.1111/j.1749-6632.2009.04420.x
pmid:19338512
pmcid:PMC2716071
fatcat:2vr7t5geyfd7xgypmhybygs2uq
A brief history of the resting state: The Washington University perspective
2012
NeuroImage
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We then discuss resting state research performed in our laboratory since 2005 with an emphasis on papers of particular interest. ...
We present a history of the concepts and developments that have led us to focus on the resting state as an object of study. ...
properties of endogenous activity are modulated by the state of the eyes (Bianciardi et al., 2009; McAvoy et al., 2008) , by concurrent performance of semantic (Fransson, 2006) and motor tasks (Sun ...
doi:10.1016/j.neuroimage.2012.01.044
pmid:22266172
pmcid:PMC3342417
fatcat:4chvkrer6jgrtkwkys4ntmng2i
EEG Correlates of Self-Referential Processing
2013
Frontiers in Human Neuroscience
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In this review, I discuss studies, which employed both these approaches and show that in line with fMRI evidence, EEG correlates of self-referential processing are most frequently found in brain regions ...
Firstly, because simultaneous registration of EEG and fMRI has become possible, the degree of overlap between these two signals in brain regions related to self-referential processing could be determined ...
Together with studies reporting reduced attention to the external environment, these correlations suggest a reduction of activity in brain regions associated with externally directed attention and a potential ...
doi:10.3389/fnhum.2013.00264
pmid:23761757
pmcid:PMC3674309
fatcat:lfldnq4xqzenvbmyznvacrp3rm
Intrinsic Coupling Modes: Multiscale Interactions in Ongoing Brain Activity
2013
Neuron
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ACKNOWLEDGMENTS This work was supported by grants from the EU (FP7-ICT-270212, ERC-2010-AdG-269716), the DFG (SFB 936/A1/A2/A3/B2/C1), and the BMBF (031A130). ...
We thank Tobias Donner, Peter Kö nig, Friedhelm Hummel, and Christian Moll for helpful comments on the manuscript. ...
It has been suggested that slow changes in both BOLD signal and power envelopes of oscillatory signals, may reflect endogenous fluctuations of neuronal excitability, which occur in a coupled manner across ...
doi:10.1016/j.neuron.2013.09.038
pmid:24267648
fatcat:dzf3ub42l5cn7jbpetc2sfnhte
Proceedings of the Third International Workshop on Advances in Electrocorticography
2012
Epilepsy & Behavior
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As in prior meetings, a true multidisciplinary fusion of clinicians, scientists, and engineers from many disciplines gathered to summarize contemporary experiences in brain surface recordings. ...
The proceedings of this meeting serve as evidence of a very robust and transformative field but will yet again require revision to incorporate the advances that the following year will surely bring. ...
In addition, task performance was well predicted by a rapid increase in attention-modulated neural selectivity across both local single-electrode and population-level cortical responses. ...
doi:10.1016/j.yebeh.2012.09.016
pmid:23160096
pmcid:PMC4041796
fatcat:fwbxayle7rdtbhiqbzg6lqj4ju
Spectral signature and behavioral consequence of spontaneous shifts of pupil-linked arousal in human
2021
eLife
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We simultaneously monitored magnetoencephalography and pupil in healthy volunteers at rest and during a visual perceptual decision-making task. ...
Pupil size recorded at prestimulus baseline correlates with subsequent shifts in detection bias (c) and sensitivity (d'). ...
(A)
265While signals from brainstem nuclei such as LC are difficult to detect with MEG, the brainstem nuclei send 266 widespread cortical projections and cortical activity is readily detected by MEG. ...
doi:10.7554/elife.68265
pmid:34463255
pmcid:PMC8486382
fatcat:73igrj5purclziwbbeb6uvf5se
Neural Mechanisms for Binocular Depth, Rivalry and Multistability
[chapter]
2012
Visual Cortex - Current Status and Perspectives
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Visual to be tilted with the top coming forward. ...
In general, crossed disparities, in which image features in the right image are shifted to the right, and image features in the left image are shifted to the left, are interpreted as in front of the fixation ...
Acknowledgement This work was supported by NSERC and NIH R01 EY015219 grants, and a LOF grant from the Canadian Foundation for Innovation. ...
doi:10.5772/48446
fatcat:e747i63vqraizhr5hotrwsxxtq
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