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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  
Here we present evidence that FMT phase manipulation mediated by transcranial alternating current stimulation (tACS) can block WM demand-related FMT power increase (FMT∆power) and disrupt normal WM performance  ...  After no stimulation was applied during block 1, participants in group A received tACS oscillating at their individual FMT frequency over the prefrontal cortex (PFC) while group B received sham stimulation  ...  Transcranial Alternating Current Stimulation in the MEG Environment tACS was delivered using a commercial transcranial brain stimulator (DC-STIMULATOR MR , NeuroConn GmbH, Ilmenau, Germany).  ... 
doi:10.3389/fncel.2016.00120 pmid:27199669 pmcid:PMC4858529 fatcat:yojw47tu3rbtff2s4pm2olvrle

Facilitated Event-Related Power Modulations during Transcranial Alternating Current Stimulation (tACS) Revealed by Concurrent tACS-MEG

Florian H. Kasten, Burkhard Maess, Christoph S. Herrmann
2018 eNeuro  
Significance Transcranial alternating current stimulation (tACS) is increasingly used in cognitive neuroscience to study the causal role of brain oscillations for cognition.  ...  The application of oscillatory currents through the scalp by means of transcranial alternating current stimulation (tACS), has been shown to modulate endogenous brain oscillations in a frequency specific  ... 
doi:10.1523/eneuro.0069-18.2018 pmid:30073188 pmcid:PMC6070188 fatcat:bog37xxvlrd7reb5zlqs3vrjwe

Biasing the perception of spoken words with tACS [article]

Anne Kosem, Hans Rutger Bosker, Ole Jensen, Peter Hagoort, Lars Riecke
2019 bioRxiv   pre-print
We further tested the causal influence of neural entrainment frequency during speech processing, by manipulating entrainment with continuous transcranial alternating current stimulation (tACS) at distinct  ...  in a continuous stream of speech as compared to when they are isolated, potentially because prior (stimulus-induced) entrainment of brain oscillations might be a prerequisite for tACS to be effective.  ...  We further tested the causal influence of neural entrainment frequency during speech processing, by manipulating entrainment with continuous transcranial alternating current stimulation (tACS) at distinct  ... 
doi:10.1101/806059 fatcat:lucen5jc2vbbfezaqk37555ube

Facilitated event-related power-modulations during transcranial alternating current stimulation (tACS) revealed by concurrent tACS-MEG [article]

Florian H. Kasten, Burkhard Maess, Christoph S. Herrmann
2018 bioRxiv   pre-print
Transcranial alternating current stimulation (tACS) has been shown to modulate neural oscillations in a frequency specific manner.  ...  Due to a massive stimulation artifact at the targeted frequency, only little is known about effects of tACS during stimulation.  ...  through the scalp by means of transcranial alternating 81 current stimulation (tACS) has been shown to modulate endogenous brain oscillations in a 82 frequency specific manner (Fröhlich and McCormick,  ... 
doi:10.1101/249409 fatcat:doif6ovrjvanbmsua5izttq7py

Conducting double-blind placebo-controlled clinical trials of transcranial alternating current stimulation (tACS)

Flavio Frohlich, Justin Riddle
2021 Translational Psychiatry  
Here, we show how transcranial alternating current stimulation (tACS), which applies a weak sine-wave electric current to the scalp, may serve as a therapeutic platform for the treatment of CNS illnesses  ...  We previously proposed the application of rational design for the development of non-invasive brain stimulation for the modulation and restoration of cortical oscillations as a network therapeutic.  ...  Targeting network-level activity using tACS Transcranial alternating current stimulation (tACS) is a form of non-invasive brain stimulation that applies lowamplitude rhythmic electrical current to the  ... 
doi:10.1038/s41398-021-01391-x pmid:33980854 fatcat:itsqwd76pzbdbdv2l72gkjgn2e

Slow-oscillatory tACS does not modulate human motor cortical response to repeated plasticity paradigms [article]

Claire Bradley, Jessica Elliott, Samuel Dudley, Genevieve Kieseker, Jason B Mattingley, Martin V Sale
2021 bioRxiv   pre-print
Here, slow-oscillatory transcranial alternating current stimulation (tACS, 1Hz, 1mA, 18 minutes) was interleaved between two plasticity-inducing interventions: motor learning, and a paradigm known to induce  ...  Importantly, we found moderate evidence against an effect of active tACS in restoring PAS plasticity, and no evidence of lasting entrainment of slow-oscillations in the EEG.  ...  More specifically, we asked whether a short episode of non-invasive brain stimulation known as slow-oscillatory transcranial alternating current stimulation (tACS), comparable in length to a nap, can attenuate  ... 
doi:10.1101/2021.09.20.461168 fatcat:7xaun6biczdjlig3o4crn2l73e

Alpha Power Increase After Transcranial Alternating Current Stimulation at Alpha Frequency (α-tACS) Reflects Plastic Changes Rather Than Entrainment

Alexandra Vossen, Joachim Gross, Gregor Thut
2015 Brain Stimulation  
Background: Periodic stimulation of occipital areas using transcranial alternating current stimulation (tACS) at alpha (a) frequency (8e12 Hz) enhances electroencephalographic (EEG) a-oscillation long  ...  Two mechanisms have been suggested to underlie these changes in oscillatory EEG activity: tACS-induced entrainment of brain oscillations and/or tACS-induced changes in oscillatory circuits by spike-timing  ...  NIBS-approach for such controlled intervention is transcranial alternating current stimulation (tACS). tACS involves the induction of a weak sinusoidal electric current between two or more scalp electrodes  ... 
doi:10.1016/j.brs.2014.12.004 pmid:25648377 pmcid:PMC4464304 fatcat:xwu7bqtkkbfgtkl2ml7uv7npk4

tACS competes with ongoing oscillations for control of spike-timing in the primate brain [article]

Matthew Ryan Krause, Pedro Gabrielle Vieira, Jean-Philippe Thivierge, Christopher C Pack
2021 bioRxiv   pre-print
Transcranial alternating current stimulation (tACS) is a promising but controversial method for modulating neural activity noninvasively.  ...  In contrast, neurons that were strongly locked to ongoing oscillations usually exhibited decreased entrainment during low-amplitude tACS.  ...  By using tES with alternating current, researchers often attempt to target brain functions that rely on specific oscillation frequencies (1); this approach is called transcranial alternating current stimulation  ... 
doi:10.1101/2021.10.01.462622 fatcat:yrqhobcvnrdtjemkd7uivul7t4

Bilateral Theta Transcranial Alternating Current Stimulation (tACS) Modulates EEG Activity: When tACS Works Awake It Also Works Asleep

Aurora D'Atri, Serena Scarpelli, Maurizio Gorgoni, Valentina Alfonsi, Ludovica Annarumma, Anna Maria Giannini, Michele Ferrara, Fabio Ferlazzo, Paolo Maria Rossini, Luigi De Gennaro
2019 Nature and Science of Sleep  
Recent studies demonstrate that 5-Hz bilateral transcranial alternating current stimulation (θ-tACS) on fronto-temporal areas affects resting EEG enhancing cortical synchronization, but it does not affect  ...  The current study aimed to evaluate the ability of fronto-temporal θ-tACS to promote sleep.  ...  encircling the stimulated site. 10 In one recent study, however, we used bilateral transcranial alternating current stimulation at 5 Hz (θ-tACS) on fronto-temporal areas. 11 This stimulation induced  ... 
doi:10.2147/nss.s229925 pmid:31819688 pmcid:PMC6875492 fatcat:g6n25dgu7jgpbmhb2cvcgnc6ai

Challenges of P300 Modulation Using Transcranial Alternating Current Stimulation (tACS)

Fabian Popp, Isa Dallmer-Zerbe, Alexandra Philipsen, Christoph S. Herrmann
2019 Frontiers in Psychology  
Transcranial Alternating Current Stimulation (tACS) is capable of modulating oscillatory brain activity in a frequency-specific manner.  ...  Event-related oscillations (ERO) represent a potential mechanism responsible for generating the ERP.  ...  ACKNOWLEDGMENTS We thank Florian Kasten for his help with modeling the current flow of the stimulation.  ... 
doi:10.3389/fpsyg.2019.00476 pmid:30890990 pmcid:PMC6411790 fatcat:qai6u5phzncwbcnnhvgggnm4ry

tACS Facilitates Flickering Driving by Boosting Steady-State Visual Evoked Potentials [article]

Bingchuan Liu, Xinyi Yan, Xiaogang Chen, Yijun Wang, Xiaorong Gao
2020 arXiv   pre-print
There has become of increasing interest in transcranial alternating current stimulation (tACS) since its inception nearly a decade ago. tACS in modulating brain state is an active area of research and  ...  brain stimulation.  ...  Among all noninvasive stimulation methods, transcranial alternating current stimulation (tACS), is a novel neuromodulation technique by applying sinusoidal stimulations on the scalp and thereby contributes  ... 
arXiv:2003.12928v1 fatcat:armwpo76f5gepifoqmozrg7rb4

Selective Modulation of Interhemispheric Functional Connectivity by HD-tACS Shapes Perception

Randolph F. Helfrich, Hannah Knepper, Guido Nolte, Daniel Strüber, Stefan Rach, Christoph S. Herrmann, Till R. Schneider, Andreas K. Engel, Ole Jensen
2014 PLoS Biology  
Here, we combined bilateral high-density transcranial alternating current stimulation (HD-tACS) at 40 Hz with simultaneous electroencephalographic (EEG) recordings to study immediate electrophysiological  ...  effects during the selective entrainment of oscillatory gamma-band signatures.  ...  Acknowledgments The authors would like to thank Christoph Mulert for help with the stimulator, Karin Deazle for assistance with participant recruitment, and Christina Leduc (German National Exchange Service  ... 
doi:10.1371/journal.pbio.1002031 pmid:25549264 pmcid:PMC4280108 fatcat:dqwye6mpgvel3dvkilhvvlf6qe

Multi-frequency tACS has lasting effects on neural synchrony and audiovisual responses [article]

Tobias Bockhorst, Joachim Ahlbeck, Florian Pieper, Gerhard Engler, Andreas K. Engel
2019 bioRxiv   pre-print
Transcranial alternating current stimulation (tACS) has been explored as a flexible, noninvasive tool for the modulation and restoration of synchronized oscillatory signals.  ...  OBJECTIVE: Here, we screened for lasting aftereffects of prolonged tACS on intrinsic network activity and audiovisual processing in the anesthetized ferret brain.  ...  Effects of weak transcranial alternating current stimulation on brain activity-a review of known mechanisms from animal studies. Front Hum Neurosci 2013;7:687. doi:10.3389/fnhum.2013.00687.  ... 
doi:10.1101/526087 fatcat:agbjieggmnbf7bxxfd4iwkokka

Exploring parameters of gamma transcranial alternating current stimulation (tACS) and full-spectrum transcranial random noise stimulation (tRNS) on human pharyngeal cortical excitability

Mengqing Zhang, Ivy Cheng, Ayodele Sasegbon, Zulin Dou, Shaheen Hamdy
2021 Neurogastroenterology and Motility  
Transcranial alternating current stimulation (tACS) and transcranial random noise stimulation (tRNS) have been shown to have physiological and functional effects on brain excitability and motor behavior  ...  Pharyngeal motor-evoked and thenar motor-evoked potentials (PMEPs and TMEPs) were assessed before and up to 2 h after stimulation with single-pulse transcranial magnetic stimulation.  ...  | INTRODUC TI ON Transcranial alternating current stimulation (tACS) and transcranial random noise stimulation (tRNS) are two novel, non-invasive brain stimulation (NIBS) techniques that deliver low-intensity  ... 
doi:10.1111/nmo.14173 pmid:34081376 fatcat:zyzx2s2usbcehdd6ws7s362bhq

Transient amplitude modulation of alpha-band oscillations by short-time intermittent closed-loop tACS [article]

Georgy Zarubin, Christopher Gundlach, Vadim Nikulin, Arno Villringer, Martin Bogdan
2020 bioRxiv   pre-print
Non-invasive brain stimulation techniques such as transcranial alternating current stimulation (tACS) have recently become extensively utilized due to their potential to modulate ongoing neuronal oscillatory  ...  In the present study we used a closed-loop EEG transcranial alternating current stimulation protocol (EEG-tACS) to examine the modulation of alpha oscillations generated in occipito-parietal areas.  ...  However, transcranial alternating current stimulation (tACS) also has broad applications due to its ability to modulate ongoing neural oscillatory activity in a flexible way by precisely tuning stimulation  ... 
doi:10.1101/2020.01.23.916676 fatcat:ehqjfwyb7nfk7h2yejlzntmb6q
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