Filters








775 Hits in 8.4 sec

Neocortical dynamics due to axon propagation delays in cortico-cortical fibers: EEG traveling and standing waves with implications for top-down influences on local networks and white matter disease

Paul L. Nunez, Ramesh Srinivasan
2014 Brain Research  
, and the effects of white matter deficits.  ...  The global models suggest that global oscillatory behavior of self-sustained (limit-cycle) modes lower than about 20 Hz may easily occur in neocortical/white matter systems provided: Background cortical  ...  White matter architecture rather than cortical surface area correlates with the EEG alpha rhythm, NeuroImage 49: 2328-2339. van Rotterdam A, Lopes da Silva FH, van der Ende J, Viergever MA, and Hermans  ... 
doi:10.1016/j.brainres.2013.10.036 pmid:24505628 pmcid:PMC3942804 fatcat:c3pvyqt7ojg2rnlzjnsjv2yrrq

Electroencephalography-driven approach to prodromal Alzheimer's disease diagnosis: from biomarker integration to network-level comprehension

Moretti DV
2016 Clinical Interventions in Aging  
Keywords: prodromal AD, EEG, SPECT, MRI, alpha rhythm, hippocampal atrophy  ...  Additionally, shrinkage of the temporoparietal cerebral area has been connected with an increase in α3/α2 electroencephalogram (EEG) power ratio in prodromal AD.  ...  Cortical thickness was estimated by utilizing the area between these surfaces (white and pial surfaces) at ~160,000 focuses for each hemisphere in the cortical mantle.  ... 
doaj:fa78da26fabd4897b1c6e9c97773b312 fatcat:nouewespbbazrkbxlanbx4bau4

News From Other Journals and Websites

Martijn Arns
2010 Journal of Neurotherapy  
Neuropsychopharmacology, 35, 301-316. tDCS. rather than cortical surface area correlates with the EEG alpha rhythm. Neuroimage, 49, 2328-2339.  ...  White matter architecture nial magnetic stimulation (rTMS) affects novelty processing in autism.  ... 
doi:10.1080/10874208.2010.523344 fatcat:izmoe6uv2rgabaamyzqr3rmr4y

The functional significance of mu rhythms: Translating "seeing" and "hearing" into "doing"

Jaime A. Pineda
2005 Brain Research Reviews  
This raises questions about the mu rhythm's open neural architecture and ability to respond to cognitive, affective, and motor imagery, implying an even greater developmental and functional role than has  ...  Existing evidence indicates that mu and other alpha-like rhythms are independent phenomena because of differences in source generation, sensitivity to sensory events, bilateral coherence, frequency, and  ...  This suggests that sensorimotor cortex displays a variety of mu rhythms with specific topographic and functional properties rather than one uniform rhythm.  ... 
doi:10.1016/j.brainresrev.2005.04.005 pmid:15925412 fatcat:atpusckgnzbn3hgfppd6lsbj5e

Prediction of brain-computer interface aptitude from individual brain structure

S. Halder, B. Varkuti, M. Bogdan, A. Kübler, W. Rosenstiel, R. Sitaram, N. Birbaumer
2013 Frontiers in Human Neuroscience  
In contrast, the structural integrity and myelination quality of deep white matter structures such as the Corpus Callosum, Cingulum, and Superior Fronto-Occipital Fascicle were positively correlated with  ...  Methods: We hypothesized that integrity and connectivity of involved white matter connections may serve as a predictor of individual BCI-performance.  ...  Specifically, the dynamics of the resting state alpha rhythm appear to be connected to white matter architecture (Valdés-Hernández et al., 2010) .  ... 
doi:10.3389/fnhum.2013.00105 pmid:23565083 pmcid:PMC3613602 fatcat:f5zgpj45kbawbi4jqt5ervslx4

A Connectome-Based, Corticothalamic Model of State- and Stimulation-Dependent Modulation of Rhythmic Neural Activity and Connectivity

John D. Griffiths, Anthony Randal McIntosh, Jeremie Lefebvre
2020 Frontiers in Computational Neuroscience  
Our results provide new insight into the role played by cortical and corticothalamic circuits in shaping intrinsic brain rhythms, and suggest new directions for brain stimulation therapies aimed at state-and  ...  We present and examine a whole-brain, connectome-based neural mass model with detailed long-range cortico-cortical connectivity and strong, recurrent corticothalamic circuitry.  ...  diagonal), and the classic two-block hemispheric structure with stronger intra-than inter-hemispheric correlations.  ... 
doi:10.3389/fncom.2020.575143 pmid:33408622 pmcid:PMC7779529 fatcat:yrhm7yuojrbqpbd7yixugrxf3q

Cerebral and Cerebellar Potentials

Frédéric Bremer
1958 Physiological Reviews  
anesthetics to pro- mote regular cortical rhythms can be correlated with the grouping in bursts, which they determine, of the unit spikes of subcortical nuclei (276, 291); 7) the undercut- ting of a cortical  ...  The spreading depression illustrates also the importance of steady potential fields between the surface of the brain and the subcortical white matter for the normal functioning of the neocortex.  ... 
doi:10.1152/physrev.1958.38.3.357 pmid:13567040 fatcat:fhanoudxavb4vejniw2y7fummi

Linking Brain Connectivity Across Different Time Scales with Electroencephalogram, Functional Magnetic Resonance Imaging, and Diffusion Tensor Imaging

Kay Jann, Andrea Federspiel, Stéphanie Giezendanner, Jennifer Andreotti, Mara Kottlow, Thomas Dierks, Thomas Koenig
2012 Brain Connectivity  
These areas colocalized with functionally connected networks supporting the respective functions.  ...  oscillatory property at rest: the individual alpha frequency (IAF).  ...  This study was partially financed by the Swiss National Science Foundation (SNSF) Grant 320000-108321/1.  ... 
doi:10.1089/brain.2011.0063 pmid:22574926 pmcid:PMC3621301 fatcat:uyszz7im65gglovf3lipazbnwy

Modeling the contribution of lamina 5 neuronal and network dynamics to low frequency EEG phenomena

Fadi N. Karameh, Munther A. Dahleh, Emery N. Brown, Steve G. Massaquoi
2006 Biological cybernetics  
With the advent of recording techniques, new evidence is emerging on the neuronal populations and wiring in the neocortex.  ...  The Electroencephalogram (EEG) is an important clinical and research tool in neurophysiology.  ...  We illustrate how this architecture and the associated dynamical behavior can be used to study well known EEG rhythmicities such as the alpha rhythms (∼ 10 Hz) observed over the visual areas under attentional  ... 
doi:10.1007/s00422-006-0090-8 pmid:16897093 fatcat:kpx2gmvozfh47dj3gfntsmfa2u

Neocortical Dynamics at Multiple Scales: EEG Standing Waves, Statistical Mechanics, and Physical Analogs

Lester Ingber, Paul L. Nunez
2010 Social Science Research Network  
In treating global mechanisms, we stress the importance of myelinated axon propagation delays and periodic boundary conditions in the cortical-white matter system, which is topologically close to a spherical  ...  , across cortical regions via myelinated fibers, and also derive a string equation consistent with the global EEG model.  ...  , statistically significant relations between several aspects of white matter architecture and peak alpha frequencyw ere reported.  ... 
doi:10.2139/ssrn.1595507 fatcat:lwe7ptkzyjh6jeiamqslxv7i2e

Neocortical dynamics at multiple scales: EEG standing waves, statistical mechanics, and physical analogs

Lester Ingber, Paul L. Nunez
2011 Mathematical Biosciences  
In treating global mechanisms, we stress the importance of myelinated axon propagation delays and periodic boundary conditions in the cortical-white matter system, which is topologically close to a spherical  ...  , across cortical regions via myelinated fibers, and also derive a string equation consistent with the global EEG model.  ...  , statistically significant relations between several aspects of white matter architecture and peak alpha frequencyw ere reported.  ... 
doi:10.1016/j.mbs.2010.12.003 pmid:21167841 fatcat:seriewoaurfxbcik43yqeykrx4

Sleep Spindles – As a Biomarker of Brain Function and Plasticity [chapter]

Yuko Urakami, Andreas A., George K.
2012 Advances in Clinical Neurophysiology  
The work of AAI and GKK was partially funded by the European Commission under the Seventh Framework Programme (FP7/2007-2013) with grant ARMOR, agreement number 287720.  ...  Acknowledgement The work of YU for this review article was supported by Grants-in-Aid for Scientific Research 23500473 (Japan Society for the Promotion of Science).  ...  cortical layers (10) rather than the fourth cortical layer.  ... 
doi:10.5772/48427 fatcat:sqdfz7gjpjd6hlkzmilmtqgffu

Evidence for genetic regulation of the human parieto-occipital 10-Hz rhythmic activity

Elina Salmela, Hanna Renvall, Jan Kujala, Osmo Hakosalo, Mia Illman, Minna Vihla, Eira Leinonen, Riitta Salmelin, Juha Kere, John Foxe
2016 European Journal of Neuroscience  
The reactivity of the alpha rhythm was quantified from the difference spectra between the two conditions.  ...  To uncover possible genetic determinants of the most prominent brain signal oscillation, the parieto-occipital 10-Hz alpha rhythm, we measured spontaneous brain activity with magnetoencephalography in  ...  The funding sources had no role in study design,  ... 
doi:10.1111/ejn.13300 pmid:27306141 pmcid:PMC5113795 fatcat:4wm7zvurnzdjhnupephp6k6jrm

Developmental changes in spontaneous electrocortical activity and network organization from early to late childhood

Vladimir Miskovic, Xinpei Ma, Chun-An Chou, Miaolin Fan, Max Owens, Hiroki Sayama, Brandon E. Gibb
2015 NeuroImage  
Moreover, the peak of the alpha frequency increased with chronological age and there was a redistribution of relative spectral density toward the higher frequency ranges, consistent with much of the previous  ...  Overall, there were major decreases in absolute EEG spectral density (particularly in the slow wave range) across cortical lobes as a function of age.  ...  Increases in myelination and white matter density have been suggested to underlie shifts in the peak frequency of the posterior alpha-band rhythm that are observed across age (Segalowitz et al., 2010)  ... 
doi:10.1016/j.neuroimage.2015.06.013 pmid:26057595 pmcid:PMC4554821 fatcat:2ffob7hun5cf5ofgy66yirspdu

Transcranial direct current stimulation changes resting state functional connectivity: A large-scale brain network modeling study

Tim Kunze, Alexander Hunold, Jens Haueisen, Viktor Jirsa, Andreas Spiegler
2016 NeuroImage  
The main findings of this study are fourfold: Firstly, we found a tDCS-induced increase in functional connectivity among cerebral areas and among EEG sensors, where the latter reproduced empirical findings  ...  Fourthly, new dynamic states emerged through interacting areas in the network compared to the dynamics of an isolated area.  ...  Spectral changes in EEG during tDCS (γ = 22, û tDCS = 4 mV) with regard to rest. Under rest and during stimulation, rhythms occurred mainly in the alpha and the delta-band.  ... 
doi:10.1016/j.neuroimage.2016.02.015 pmid:26883068 fatcat:vddk5zi52redhl5mzawwd57ek4
« Previous Showing results 1 — 15 out of 775 results