Abstract：
:In the neglect syndrome, the perceptual deficit for contra-lesional hemi-space is increasingly viewed as a dysfunction of fronto-parietal cortical networks, the disruption of which has been described in neuroanatomical and hemodynamic studies. Here we exploit the superior temporal resolution of electroencephalography (EEG) to study dynamic transient connectivity of fronto-parietal circuits at early stages of visual perception in neglect. As reflected by inter-regional phase synchronization in a full-field attention task, two functionally distinct fronto-parietal networks, in beta (15-25Hz) and theta (4-8Hz) frequency bands, were related to stimulus discrimination within the first 200 ms of visual processing. Neglect pathology was specifically associated with significant suppressions of both beta and theta networks engaging right parietal regions. These connectivity abnormalities occurred in a pattern that was distinctly different from what was observed in right-hemisphere lesion patients without neglect. Also, both beta and theta abnormalities contributed additively to visual awareness decrease, quantified in the Behavioural Inattention Test. These results provide evidence for the impairment of fast dynamic fronto-parietal interactions during early stages of visual processing in neglect pathology. Also, they reveal that different modes of fronto-parietal dysfunction contribute independently to deficits in visual awareness at the behavioural level.
journal_name
Neuroimagejournal_title
NeuroImageauthors
Yordanova J,Kolev V,Verleger R,Heide W,Grumbt M,Schürmann Mdoi
10.1016/j.neuroimage.2016.11.013subject
Has Abstractpub_date
2017-02-01 00:00:00pages
341-354eissn
1053-8119issn
1095-9572pii
S1053-8119(16)30618-8journal_volume
146pub_type
杂志文章相关文献
NEUROIMAGE文献大全abstract：:Spontaneous activity of the brain at rest frequently has been considered a mere backdrop to the salient activity evoked by external stimuli or tasks. However, the resting state of the brain consumes most of its energy budget, which suggests a far more important role. An intriguing hint comes from experimental observat...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2012.10.024
更新日期：2013-02-01 00:00:00
abstract：:Supra-spinal pain processing involves a number of extensive networks. An examination of these networks using small animal functional magnetic resonance imaging (fMRI) is difficult. While prior studies have successfully delineated regions consistent with known pain processing pathways, they have been restricted to acqu...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2006.12.014
更新日期：2007-04-01 00:00:00
abstract：:The dynamic and flexible nature of memories is evident in our ability to adopt multiple visual perspectives. Although autobiographical memories are typically encoded from the visual perspective of our own eyes they can be retrieved from the perspective of an observer looking at our self. Here, we examined the neural m...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2016.12.028
更新日期：2017-03-01 00:00:00
abstract：:The alpha-2-adrenoreceptor agonist, medetomidine, which exhibits dose-dependent sedative effects and is gaining acceptance in small-animal functional magnetic resonance imaging (fMRI), has been studied. Rats were examined on the bench using the classic tail-pinch method with three infusion sequences: 100 microg/kg/h, ...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2009.03.004
更新日期：2009-07-15 00:00:00
abstract：:Gamma-aminobutyric acid (GABA) is the main inhibitory neurotransmitter in the central auditory system. Altered GABAergic neurotransmission has been found in both the inferior colliculus and the auditory cortex in animal models of presbycusis. Edited magnetic resonance spectroscopy (MRS), using the MEGA-PRESS sequence,...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2014.11.023
更新日期：2015-02-01 00:00:00
abstract：:The purpose of this study was to investigate whether current or lifetime alcohol intake is related to focal gray and white matter in healthy non-alcohol-dependent drinkers, and, if so, whether these densities are related to functional brain activity associated with visual attention. Voxel-based morphometric analyses o...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2005.01.036
更新日期：2005-06-01 00:00:00
abstract：:Recent psychophysics studies suggest that the behavioral impact of a visual stimulus and its conscious visual recognition underlie two functionally dissociated neuronal processes. Previous TMS studies have demonstrated that certain features of a visual stimulus can still be processed despite TMS-induced disruption of ...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2008.07.030
更新日期：2009-01-01 00:00:00
abstract：:Motor tasks involve neural activity in a spatially distributed network. It is assumed that coherent activity between these brain structures reflects functional connectivity. The aim of the present study was to investigate brain areas associated with a unimanual auditorily paced finger-tapping task and to characterize ...
journal_title：NeuroImage
pub_type： 临床试验,杂志文章
doi：10.1016/j.neuroimage.2004.10.009
更新日期：2005-02-01 00:00:00
abstract：:High frequency brain oscillations are associated with numerous cognitive and behavioral processes. Non-invasive measurements using electro-/magnetoencephalography (EEG/MEG) have revealed that high frequency neural signals are heritable and manifest changes with age as well as in neuropsychiatric illnesses. Despite the...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2016.05.006
更新日期：2016-08-15 00:00:00
abstract：:The human brain can be modeled as multiple interrelated shapes (or a multishape), each for characterizing one aspect of the brain, such as the cortex and white matter pathways. Predicting the developing multishape is a very challenging task due to the contrasting nature of the developmental trajectories of the constit...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2017.03.012
更新日期：2017-05-15 00:00:00
abstract：:Although research has demonstrated a relationship between proinflammatory cytokine activity and depressive symptoms, the neurocognitive processes underlying this relationship have remained largely unexplored. Here, we examined the effect of proinflammatory cytokine activation on the neural correlates of socially painf...
journal_title：NeuroImage
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.neuroimage.2009.04.040
更新日期：2009-09-01 00:00:00
abstract：:Reduced cognitive control is considered a core feature of bipolar disorder (BD). Abnormalities in ventrolateral prefrontal cortex (VLPFC) and other functionally linked regions that underpin cognitive control during the Stroop Colour Word Task (SCWT) have been reported in patients with BD and their relatives. In this f...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2011.04.055
更新日期：2011-07-15 00:00:00
abstract：:The blood-oxygenation-level-dependent (BOLD) signal is dependent on multiple physiological factors such as cerebral blood flow (CBF), local oxygen metabolism (CMRO(2)) and cerebral blood volume (CBV). Since caffeine affects both CBF and neural activity, its effects on BOLD remain controversial. The calibrated BOLD app...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2008.09.057
更新日期：2009-02-01 00:00:00
abstract：:Social exclusion and risk-taking are both common experiences of concern in adolescence, yet little is known about how the two may be related at behavioral or neural levels. In this fMRI study, adolescents (N=27, 14 male, 14-17years-old) completed a series of tasks in the scanner assessing risky decision-making before ...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2013.05.061
更新日期：2013-11-15 00:00:00
abstract：:Recently, T2* imaging at 7Tesla (T) MRI was shown to reveal microstructural features of the cortical myeloarchitecture thanks to an increase in contrast-to-noise ratio. However, several confounds hamper the specificity of T2* measures (iron content, blood vessels, tissues orientation). Another metric, magnetization tr...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2015.06.033
更新日期：2015-10-01 00:00:00
abstract：:The medial wall of the frontal cortex is thought to play an important role for bimanual coordination. However, there is uncertainty regarding the exact neuroanatomical regions involved. We compared the activation patterns related to bimanual movements using functional magnetic resonance imaging in 12 healthy right-han...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1006/nimg.2001.0856
更新日期：2001-09-01 00:00:00
abstract：:Conway (Conway, M.A., 1992. A structural model of autobiographical memory. In: Conway, M.A., Spinnler, H., Wagenaar, W.A. (Eds.), Theoretical Perspectives on Autobiological Memory. Kluwer Academic Publishers, Dordrecht, The Netherlands, pp. 167-194) proposed that two types of autobiographical memories (AMs) exist with...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2004.08.007
更新日期：2004-12-01 00:00:00
abstract：:Functional near-infrared spectroscopy (fNIRS) is a non-invasive brain imaging method that uses light to record regional changes in cerebral blood flow in the cortex during activation. fNIRS uses portable wearable sensors to allow measurements of brain activation during tasking. In this study, fNIRS was used to investi...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2013.02.010
更新日期：2013-07-01 00:00:00
abstract：:Automated measures of cerebral magnetic resonance images (MRI) often provide greater speed and reliability compared to manual techniques but can be particularly sensitive to motion artifact. This study employed an automatic MRI analysis program that quantified regional gray matter volume and created images for verific...
journal_title：NeuroImage
pub_type： 临床试验,杂志文章
doi：10.1006/nimg.2002.1076
更新日期：2002-05-01 00:00:00
abstract：:Activity of cortical local neuronal populations fluctuates continuously, and a large proportion of these fluctuations are shared across populations of neurons. Here we seek organizational rules that link these two phenomena. Using neuronal activity, as identified by functional MRI (fMRI) and for a given voxel or brain...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2013.01.072
更新日期：2013-06-01 00:00:00
abstract：:Essential tremor is effectively treated with deep brain stimulation (DBS), but the neural mechanisms underlying the treatment effect are poorly understood. Essential tremor is driven by a dysfunctional cerebello-thalamo-cerebral circuit resulting in pathological tremor oscillations. DBS is hypothesised to interfere wi...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2019.116511
更新日期：2020-04-01 00:00:00
abstract：:Although depressive mood is an important psychological determinate of chronic pain, the neural circuitry that mediates its influence on the pain experience is largely unknown. We used functional magnetic resonance imaging (FMRI) to investigate the neurophysiological interactions between depressive symptoms and disease...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2007.12.016
更新日期：2008-04-01 00:00:00
abstract：:Rhythmic brain activity may reflect a functional mechanism that facilitates cortical processing and dynamic interareal interactions and thereby give rise to complex behavior. Using magnetoencephalography (MEG), we investigated rhythmic brain activity in a brain-wide network and their relation to behavior, while human ...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2020.117351
更新日期：2020-12-01 00:00:00
abstract：:In the present study, we applied high-resolution functional magnetic resonance imaging (fMRI) of the human auditory cortex (AC) and adjacent areas to compare activations during spatial discrimination and spatial n-back memory tasks that were varied parametrically in difficulty. We found that activations in the anterio...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2011.10.069
更新日期：2012-02-15 00:00:00
abstract：:In a recent electrophysiological study, we reported on global facilitation but local suppression of color stimuli in feature-based attention in human early visual cortex. Subjects attended to one of two centrally located superimposed red/blue random dot kinematograms (RDKs). Task-irrelevant single RDKs in the same col...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2018.05.073
更新日期：2018-09-01 00:00:00
abstract：:The ability to select and integrate relevant information in the presence of competing irrelevant information can be enhanced by advance information to direct attention and guide response selection. Attentional preparation can reduce perceptual and response conflict, yet little is known about the neural source of confl...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2009.06.058
更新日期：2009-11-01 00:00:00
abstract：:The Neuroimaging Informatics Tools and Resources Clearinghouse (NITRC - www.nitrc.org) suite of services include a resources registry, image repository and a cloud computational environment to meet the needs of the neuroimaging researcher. NITRC provides image-sharing functionality through both the NITRC Resource Regi...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2015.05.074
更新日期：2016-01-01 00:00:00
abstract：:Transcranial color coded sonography has proved valuable in the diagnostic work-up of cerebrovascular disorders in adults. More recently, evidences have converged that transcranial sonography is also useful in the diagnosis of brain parenchymal disorders. Here, a new field of application is the visualization of signal ...
journal_title：NeuroImage
pub_type： 杂志文章,评审
doi：10.1006/nimg.2001.1014
更新日期：2002-03-01 00:00:00
abstract：:A common assumption in the study of brain functional connectivity is that the brain network is stationary. However it is increasingly recognized that the brain organization is prone to variations across the scanning session, fueling the need for dynamic connectivity approaches. One of the main challenges in developing...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2018.07.045
更新日期：2018-12-01 00:00:00
abstract：:Since endothelial cells can be targeted by large contrast-carrying particles, molecular imaging of cerebrovascular cell activation is highly promising to evaluate the underlying inflammation of the central nervous system (CNS). In this study, we aimed to demonstrate that molecular magnetic resonance imaging (MRI) of c...
journal_title：NeuroImage
pub_type： 杂志文章
doi：10.1016/j.neuroimage.2012.07.018
更新日期：2012-11-01 00:00:00
