1,628 Hits in 6.2 sec

Instantaneous voltage as an alternative to power- and phase-based interpretation of oscillatory brain activity

Gerwin Schalk, Joshua Marple, Robert T. Knight, William G. Coon
2017 NeuroImage  
For decades, oscillatory brain activity has been characterized primarily by measurements of power and phase.  ...  These results synthesize the previously separate power-and phase-based interpretations and associate oscillatory activity directly with a physiological interpretation of cortical excitability.  ...  W.G.C. and J.M. analyzed data. G.S., R.T.K., and W.G.C. wrote the paper. All authors discussed results.  ... 
doi:10.1016/j.neuroimage.2017.06.014 pmid:28624646 pmcid:PMC5600843 fatcat:2elemcmne5evbip2storwsntva

Cycle-by-cycle analysis of neural oscillations

Scott Cole, Bradley Voytek
2019 Journal of Neurophysiology  
This approach performs tests to assess whether an oscillation is present at any given moment and, if so, quantifies each oscillatory cycle by its amplitude, period, and waveform symmetry, the latter of  ...  Neural oscillations are widely studied using methods based on the Fourier transform, which models data as sums of sinusoids.  ...  ACKNOWLEDGMENTS We thank Richard Gao, Tammy Tran, and Tom Donoghue for invaluable discussion and comments on the manuscript.  ... 
doi:10.1152/jn.00273.2019 pmid:31268801 fatcat:5veh6xg4xvgzhgwlmq3xm2g5uy

Nonsinusoidal Beta Oscillations Reflect Cortical Pathophysiology in Parkinson's Disease

Scott R. Cole, Roemer van der Meij, Erik J. Peterson, Coralie de Hemptinne, Philip A. Starr, Bradley Voytek
2017 Journal of Neuroscience  
For example, there is evidence that parkinsonian bradykinesia and rigidity may arise from an oversynchronization of afferents to the motor cortex, and that these symptoms are treatable using deep brain  ...  Oscillations in neural activity play a critical role in neural computation and communication.  ...  Introduction Oscillatory activity is abundant in electrophysiological recordings in a variety of species, brain regions, and spatial scales (Buzsáki & Draguhn 2004; Buzsáki 2006; Engel et al. 2001; Schnitzler  ... 
doi:10.1523/jneurosci.2208-16.2017 pmid:28416595 pmcid:PMC5426572 fatcat:ldg34bsi45bwnjzuz5plc5mymy

Phase-Dependent Deep Brain Stimulation: A Review

Lekshmy Sudha Kumari, Abbas Z. Kouzani
2021 Brain Sciences  
For making use of the neural oscillations as biomarkers to manipulate the frequency band of the oscillation, phase of the oscillation, and stimulation signal are of importance.  ...  Closed loop deep brain stimulation paradigms with neural oscillations as biomarkers could be used as a mechanism to understand the function of these oscillations.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/brainsci11040414 pmid:33806170 pmcid:PMC8103241 fatcat:rbwpb2ldzzg55acvbhu6ym4awq

Guiding transcranial brain stimulation by EEG/MEG to interact with ongoing brain activity and associated functions: A position paper

Gregor Thut, Til Ole Bergmann, Flavio Fröhlich, Surjo R. Soekadar, John-Stuart Brittain, Antoni Valero-Cabré, Alexander T. Sack, Carlo Miniussi, Andrea Antal, Hartwig Roman Siebner, Ulf Ziemann, Christoph S. Herrmann
2017 Clinical Neurophysiology  
Conflict of interest GT has received honoraria as editor from Wiley Publishers. FF is the lead inventor of IP filed by UNC.  ...  FF is the founder, CSO, and majority owner of Pulvinar Neuro LLC. HRS has served on a scientific advisory board for Lundbeck A/S, Valby Denmark, and has  ...  CSH and UZ are supported by the German Research Foundation (HE 3353/8-2 and ZI 542/7-1, respectively).  ... 
doi:10.1016/j.clinph.2017.01.003 pmid:28233641 pmcid:PMC5385293 fatcat:adlk6xcj7fb7xkquxlms2mu4u4

Cycle-by-cycle analysis of neural oscillations [article]

Scott R Cole, Bradley Voytek
2018 bioRxiv   pre-print
Neural oscillations are widely studied using methods based on the Fourier transform, which models data as sums of sinusoids.  ...  Additionally, oscillatory bursts are algorithmically identified, allowing us to investigate the variability of oscillatory features within and between bursts.  ...  S.R.C. is supported by the National Science Foundation Graduate Research Fellowship Program and the University of California, San Diego Chancellor's Research Excellence Scholarship.  ... 
doi:10.1101/302000 fatcat:srifealkj5e5bg56cwfv4hahv4

Transcranial Focused Ultrasound Modulates Intrinsic and Evoked EEG Dynamics

Jerel Mueller, Wynn Legon, Alexander Opitz, Tomokazu F. Sato, William J. Tyler
2014 Brain Stimulation  
The instantaneous phase and phase rate of EEG recordings before, during, and after transmission of transcranial focused ultrasound (tFUS) to human somatosensory cortex were examined to explore its effects  ...  Objective/hypothesis: The present study tests whether focused ultrasound transmitted through the human skull and targeted to somatosensory cortex can affect the phase and phase rate of cortical oscillatory  ...  Acknowledgments The authors would like to thank Aaron Barbour and Amanda Williams for help with data collection. WJT is a co-founder of Thync.  ... 
doi:10.1016/j.brs.2014.08.008 pmid:25265863 fatcat:26unkj4ovjazxn2gfjodwhchye

tACS Phase Locking of Frontal Midline Theta Oscillations Disrupts Working Memory Performance

Bankim S. Chander, Matthias Witkowski, Christoph Braun, Stephen E. Robinson, Jan Born, Leonardo G. Cohen, Niels Birbaumer, Surjo R. Soekadar
2016 Frontiers in Cellular Neuroscience  
After assessing and mapping phase locking values (PLV) between the tACS signal and brain oscillatory activity across the whole brain, FMT power and WM performance were assessed and compared between blocks  ...  This finding may have important implications for the treatment of brain disorders such as depression and attention deficit disorder associated with abnormal regulation of FMT activity or disorders characterized  ...  Such tACS-based entrainment of brain oscillatory activity was shown to be accompanied by periodic fluctuations in behavioral performance providing further evidence for a causal relationship between brain  ... 
doi:10.3389/fncel.2016.00120 pmid:27199669 pmcid:PMC4858529 fatcat:yojw47tu3rbtff2s4pm2olvrle

Modelling the effects of ongoing alpha activity on visual perception: The oscillation-based probability of response

Agnese Zazio, Marco Schreiber, Carlo Miniussi, Marta Bortoletto
2020 Neuroscience and Biobehavioral Reviews  
Substantial evidence has shown that ongoing neural activity significantly contributes to how the brain responds to upcoming stimuli.  ...  study of ongoing brain activity, because it provides a tool for distinguishing different neural mechanisms of alpha-driven modulation of sensory processing.  ...  According to this perspective, the instantaneous voltage level may represent a more direct measure of functional inhibition than power and phase alone, as suggested by the function-through-biased-oscillations  ... 
doi:10.1016/j.neubiorev.2020.01.037 pmid:32023485 fatcat:ynxyzawx35db5fj33n5vkegg5q

Oscillations and Spike Entrainment

Charles J. Wilson, Matthew H. Higgs, DeNard V. Simmons, Juan C. Morales
2018 F1000Research  
Oscillatory input to networks, as indicated by field potentials, must entrain neuronal firing to be a causal agent in brain activity.  ...  Within any local network of neurons, only a subset of neurons may have their firing entrained by an oscillating synaptic input, and oscillations of different frequency may engage separate subsets of neurons  ...  In this view, field potentials are taken as an indicator of patterning in the population activity of brain structures and coherent field potentials are taken as indicators of shared or reciprocally generated  ... 
doi:10.12688/f1000research.16451.1 fatcat:vxhrgntqmrbobkxy7y7kbramz4

Motor System Interactions in the Beta Band Decrease during Loss of Consciousness

Nicole C. Swann, Coralie de Hemptinne, Ryan B. Maher, Catherine A. Stapleton, Lingzhong Meng, Adrian W. Gelb, Philip A. Starr
2016 Journal of Cognitive Neuroscience  
are related to the capacity for normal brain function and behavior.  ...  coherence and phase amplitude coupling (PAC).  ...  We would also like to thank all the patients who participated in this study. This work was supported by the National Institutes of Health (Grant R01NS069779 to PAS).  ... 
doi:10.1162/jocn_a_00884 pmid:26401814 pmcid:PMC4881749 fatcat:scwsjh2aprdc3ndeufuc53skza

Interacting Coherence Resonance Oscillators

Seung Kee Han, Tae Gyu Yim, D. E. Postnov, O. V. Sosnovtseva
1999 Physical Review Letters  
The transition from nonsynchronous to synchronous state is signaled by the merging of peak frequencies in the power spectrum and also by the localized distribution of instantaneous phase differences.  ...  The phase locking for stochastic systems is considered as an event lasting for a finite time and is described with the diffusion of phase [5] or by the shape of the phase difference distribution function  ...  Based on the phase variable for each ML system [15] , the instantaneous phase difference is defined as Df f 1 2 f 2 .  ... 
doi:10.1103/physrevlett.83.1771 fatcat:537ptbohkzgdvnfe2ipefurfou

Neuronal Spike Timing Adaptation Described with a Fractional Leaky Integrate-and-Fire Model

Wondimu Teka, Toma M. Marinov, Fidel Santamaria, Boris S. Gutkin
2014 PLoS Computational Biology  
As the exponent of the fractional derivative decreases, the weights of the voltage trace increase.  ...  We further analyze spike adaptation and the responses to noisy and oscillatory input. The fractional model generates reliable spike patterns in response to noisy input.  ...  David Stockton for reading and commenting on the manuscript. Author Contributions Conceived and designed the experiments: FS WT. Analyzed the data: WT.  ... 
doi:10.1371/journal.pcbi.1003526 pmid:24675903 pmcid:PMC3967934 fatcat:oeplo4exrrcjvlbn3yz4fivaxm

Dynamics of spontaneous activity in random networks with multiple neuron subtypes and synaptic noise

Rodrigo F. O. Pena, Michael A. Zaks, Antonio C. Roque
2018 Journal of Computational Neuroscience  
Neurons are coupled by conductance-based synapses subject to synaptic noise.  ...  We explain these oscillatory and quiescent patterns by combining a phenomenological global description of the network state with local descriptions of individual neurons in their partial phase spaces.  ...  , and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.  ... 
doi:10.1007/s10827-018-0688-6 pmid:29923159 pmcid:PMC6061197 fatcat:f2nsudbxuvci5g74cdtaaya3dq

Quantifying network properties in multi-electrode recordings: spatiotemporal characterization and inter-trial variation of evoked gamma oscillations in mouse somatosensory cortex in vitro

Cristian Carmeli, Paolo Bonifazi, Hugh P. C. Robinson, Michael Small
2013 Frontiers in Computational Neuroscience  
Local field potentials were used to study the spatio-temporal properties and the instantaneous synchronization profile of the gamma oscillatory activity, combined with current source density (CSD) analysis  ...  Pair-wise differences in the oscillation phase were used to determine the presence of instantaneous synchronization between the different sites of the circuitry during the oscillatory period.  ...  Supported by an EC FP6 research grant (#12788), and a Hong Kong UGC CERG grant (PolyU 5262/11E). Michael Small is supported by an Australian Research Council Future Fellowship (FT110100896).  ... 
doi:10.3389/fncom.2013.00134 pmid:24137127 pmcid:PMC3797413 fatcat:o2gixi3zyvgcljtcfp23wrqoyi
« Previous Showing results 1 — 15 out of 1,628 results