11,981 Hits in 9.6 sec

Ultra-fast speech comprehension in blind subjects engages primary visual cortex, fusiform gyrus, and pulvinar – a functional magnetic resonance imaging (fMRI) study

Susanne Dietrich, Ingo Hertrich, Hermann Ackermann
2013 BMC Neuroscience  
To further elucidate the brain mechanisms underlying this extraordinary skill, functional magnetic resonance imaging (fMRI) was performed in blind subjects of varying ultra-fast speech comprehension capabilities  ...  and sighted individuals while listening to sentence utterances of a moderately fast (8 syl/s) or ultra-fast (16 syl/s) syllabic rate.  ...  Acknowledgements This study was supported by the German Research Foundation (DFG; SFB 550/B1, AC 55 09/01) and the Hertie Institute for Clinical Brain Research, Tübingen.  ... 
doi:10.1186/1471-2202-14-74 pmid:23879896 pmcid:PMC3847124 fatcat:cbf6olgu3zasxjqdt4fhfqf7ne

Frequency-specific mechanism links human brain networks for spatial attention

A. L. Daitch, M. Sharma, J. L. Roland, S. V. Astafiev, D. T. Bundy, C. M. Gaona, A. Z. Snyder, G. L. Shulman, E. C. Leuthardt, M. Corbetta
2013 Proceedings of the National Academy of Sciences of the United States of America  
Functional brain-imaging studies have identified networks of broadly distributed brain regions that are recruited during different attention processes; however, the dynamics by which these networks enable  ...  Attention networks become selectively phase-modulated at low frequencies (δ, θ) during the same task epochs in which they are recruited in functional MRI.  ...  The authors declare no conflict of interest. This article is a PNAS Direct Submission. ACKNOWLEDGMENTS. We thank all the patients who participated in this study for their time.  ... 
doi:10.1073/pnas.1307947110 pmid:24218604 pmcid:PMC3845177 fatcat:xgurh2kpqffr3bt24ah3rhy6we

Spontaneous Neural Dynamics and Multi-scale Network Organization

Brett L. Foster, Biyu J. He, Christopher J. Honey, Karim Jerbi, Alexander Maier, Yuri B. Saalmann
2016 Frontiers in Systems Neuroscience  
patterns and the structural network architecture of functional brain circuits.  ...  In particular, by analyzing the large-scale covariation of spontaneous hemodynamics, researchers are able to reliably identify functional networks in the human brain.  ...  ACKNOWLEDGMENTS The impetus for this review was a symposium presented by the authors at the 2014 Society for Neuroscience (SfN) meeting in Washington DC.  ... 
doi:10.3389/fnsys.2016.00007 pmid:26903823 pmcid:PMC4746329 fatcat:tlaydadeczem5nan5jgwp3a574

Frequency-specific electrophysiologic correlates of resting state fMRI networks

Carl D. Hacker, Abraham Z. Snyder, Mrinal Pahwa, Maurizio Corbetta, Eric C. Leuthardt
2017 NeuroImage  
Thus, the human brain, at rest, exhibits frequency specific electrophysiology, respecting both the spectral structure of task responses and the hierarchical organization of RSNs.  ...  Resting state functional MRI (R-fMRI) studies have shown that slow (<0.1Hz), intrinsic fluctuations of the blood oxygen level dependent (BOLD) signal are temporally correlated within hierarchically organized  ...  ., task-free, functional magnetic resonance imaging (R-fMRI) currently is the primary technique used in the investigation of intrinsic brain activity (Smith et al., 2013) .  ... 
doi:10.1016/j.neuroimage.2017.01.054 pmid:28159686 pmcid:PMC5745814 fatcat:yzezyc6sobgqrk2jipvtaankr4

Electrophysiological signatures of resting state networks in the human brain

D. Mantini, M. G. Perrucci, C. Del Gratta, G. L. Romani, M. Corbetta
2007 Proceedings of the National Academy of Sciences of the United States of America  
Moreover, the joint EEG/fMRI analysis afforded a finer physiological fractionation of brain networks in the resting human brain.  ...  Functional neuroimaging and electrophysiological studies have documented a dynamic baseline of intrinsic (not stimulus-or task-evoked) brain activity during resting wakefulness.  ...  In summary, we have combined EEG and fMRI to study the dynamic baseline functional architecture of the human brain.  ... 
doi:10.1073/pnas.0700668104 pmid:17670949 pmcid:PMC1941820 fatcat:nq23kawt5jb5liip3mpkpvnjpy

Graph-based network analysis of resting-state functional MRI

Jinhui Wang
2010 Frontiers in Systems Neuroscience  
Specifically, the topological organization of brain networks has been recently studied with graph theory.  ...  Application of these approaches to R-fMRI data has demonstrated non-trivial topological properties of functional networks in the human brain.  ...  (A) Five modules were identified in a functional network of the human brain, represented by five different colors.  ... 
doi:10.3389/fnsys.2010.00016 pmid:20589099 pmcid:PMC2893007 fatcat:iqwisy6vindatgzaetzcjvn3fu

Multilayer Brain Networks

Michael Vaiana, Sarah Feldt Muldoon
2018 Journal of nonlinear science  
Traditionally, network models have provided key insights into the structure and function of the brain.  ...  of brain networks.  ...  The content is solely the responsibility of the authors and does not necessarily represent the official views of any of the funding agencies.  ... 
doi:10.1007/s00332-017-9436-8 fatcat:h22egvxycvemnflu2mx3vbxg5q

Exploring the electrophysiological correlates of the default-mode network with intracerebral EEG

2010 Frontiers in Systems Neuroscience  
While functional imaging studies allow for a precise spatial characterization of resting state networks, their neural correlates and thereby their fine-scale temporal dynamics remain elusive.  ...  A full understanding of the mechanisms at play requires input from electrophysiological studies.  ...  Dalal, and a doctoral fellowship from the Ministère de l'Education Nationale et la Recherche (France) to Tomas Ossandon.  ... 
doi:10.3389/fnsys.2010.00027 pmid:20661461 pmcid:PMC2907269 fatcat:kfbamoxqajgbtpmi6seiqx4v2q

Gamma-band synchronisation in a frontotemporal auditory information processing network

Gregor Leicht, Jonas Björklund, Sebastian Vauth, Marius Mußmann, Moritz Haaf, Saskia Steinmann, Jonas Rauh, Christoph Mulert
2021 NeuroImage  
We found a significant BOLD signal correlation between the ACC and AC, a significant task-dependent increase of fMRI connectivity (gPPI) and a significant increase in functional coupling in the gamma frequency  ...  This study aims to reveal patterns of functional and effective connectivity within this network in healthy subjects by means of simultaneously recorded electroencephalography (EEG) and functional magnetic  ...  Central to this mechanism is that high frequency rhythmic brain activity in the gamma frequency range has been related to alternating levels of inhibition in neuronal networks modulating the degree of  ... 
doi:10.1016/j.neuroimage.2021.118307 pmid:34174389 fatcat:6ymjdbvw4zdytbtf3znsxb2sca

Human locomotion-control brain networks detected with independent component analysis

2021 Journal of Integrative Neuroscience  
These brain networks may be used as biomarkers of the neural control of normal human walking and as targets for neural modulation to improve different aspects of walking, such as rhythm and speed.  ...  Walking is a fundamental movement skill in humans. However, how the brain controls walking is not fully understood.  ...  Conflict of interest The authors declare no conflict of interest.  ... 
doi:10.31083/j.jin2003074 pmid:34645103 fatcat:erujrf6te5aljlidyk7e27tpga

Adaptive Plasticity in the Healthy Language Network: Implications for Language Recovery after Stroke

Gesa Hartwigsen
2016 Neural Plasticity  
A large number of studies applied transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (tDCS) in the healthy brain to probe the functional relevance and interaction of specific  ...  Recently, NIBS has been combined with electrophysiological techniques to modulate neural oscillations of specific cortical networks.  ...  These findings implicate that the effects of TMS over a key area for a specific language function can modulate task-specific neural activity in the whole network.  ... 
doi:10.1155/2016/9674790 pmid:27830094 pmcid:PMC5088318 fatcat:qqmwczphgneztao62jbi2stbkq

Cerebral Energy Metabolism and the Brain's Functional Network Architecture: An Integrative Review

Louis-David Lord, Paul Expert, Jeremy F Huckins, Federico E Turkheimer
2013 Journal of Cerebral Blood Flow and Metabolism  
Recent functional magnetic resonance imaging (fMRI) studies have emphasized the contributions of synchronized activity in distributed brain networks to cognitive processes in both health and disease.  ...  by large-scale changes in the organization of functional brain networks.  ...  of the functional connectivity differences observed across spatially distinct modules in the human brain.  ... 
doi:10.1038/jcbfm.2013.94 pmid:23756687 pmcid:PMC3764392 fatcat:hanj5uv2sbgs7jzjvofdpdf4je

Brain Network Mechanisms Underlying Motor Enhancement by Transcranial Entrainment of Gamma Oscillations

Marius Moisa, Rafael Polania, Marcus Grueschow, Christian C. Ruff
2016 Journal of Neuroscience  
Moreover, we found frequency-and task-specific neural compensatory activity modulations in the dorsomedial prefrontal cortex (dmPFC), suggesting a key regulatory role of this region in motor performance  ...  Moreover, we found frequency-and task-specific neural compensatory activity modulations in the dorsomedial prefrontal cortex (dmPFC), suggesting a key regulatory role of this region in motor performance  ...  On the contrary, our results show that tACS is capable of modulating movement-related brain activity both locally and at the network level, in a frequency-and task-specific fashion.  ... 
doi:10.1523/jneurosci.2044-16.2016 pmid:27881788 fatcat:xpa2adl6kbhwrjg222cwwteq4a

Task-Induced Modulation of Intrinsic Functional Connectivity Networks in the Behaving Rat

J. Li, S. Martin, M. D. Tricklebank, A. J. Schwarz, G. Gilmour
2015 Journal of Neuroscience  
While resting-state functional magnetic resonance imaging can probe intrinsic network connectivity in both human and rodent brain, behavioral modulation of these connectivity patterns has not yet been  ...  between the DMN node pair, but not in the distinct lateral cortical network, demonstrating network-specific modulation of functional connectivity.  ...  However, by selecting key regions representative of known networks as informed by imaging studies, specific hypotheses regarding the modulation of brain activity by behavior can be tested.  ... 
doi:10.1523/jneurosci.3488-14.2015 pmid:25589760 fatcat:a3kef5qlffcwtagurmllgnlywa

Distinction in Coherent Neural Network Between Resting and Working Brain States

Xiao Liu, Xiao-Hong Zhu, Wei Chen
2011 Brain Connectivity  
The stimulus-specific reorganization of the coherent network observed in the present fMRI study in human is consistent with previous electrophysiological findings from animal studies, and may suggest an  ...  essential mechanism for brain functioning.  ...  This work was partially supported by NIH Grants NS41262, NS057560, NS070839, EB006433, P41 RR08079, and P30NS057091; the Keck Foundation; and a grant from the Institute for Engineering in Medicine of the  ... 
doi:10.1089/brain.2011.0044 pmid:22432452 pmcid:PMC3604769 fatcat:l3f5agqjlvarrbh76wr7faxgem
« Previous Showing results 1 — 15 out of 11,981 results