Transcranial alternating current stimulation of frontal theta rhythm has no after-effects to improve working memory

2018 ◽  
Vol 131 ◽  
pp. S96
Author(s):  
Y.G. Pavlov ◽  
O.I. Dorogina
Keyword(s):  
Working Memory ◽  
Theta Rhythm ◽  
Alternating Current ◽  
Improve Working ◽  
After Effects ◽  
Transcranial Alternating Current Stimulation ◽  
Stimulation Of

Comparatively weak after-effects of transcranial alternating current stimulation (tACS) on cortical excitability in humans

2008 ◽  
Vol 1 (2) ◽  
pp. 97-105 ◽  
Author(s):  
Andrea Antal ◽  
Klára Boros ◽  
Csaba Poreisz ◽  
Leila Chaieb ◽  
Daniella Terney ◽  
...  
Keyword(s):  
Cortical Excitability ◽  
Alternating Current ◽  
After Effects ◽  
Transcranial Alternating Current Stimulation

Changes in TMS measures of cortical excitability induced by transcranial direct and alternating current stimulation

2021 ◽  
Author(s):  
Michael A. Nitsche ◽  
Walter Paulus ◽  
Gregor Thut
Keyword(s):  
Brain Stimulation ◽  
Cortical Excitability ◽  
Brain Activity ◽  
Alternating Current ◽  
Transcranial Electrical Stimulation ◽  
Electrical Currents ◽  
After Effects ◽  
Brain Physiology ◽  
Transcranial Alternating Current Stimulation ◽  
Oscillatory Brain Activity

Brain stimulation with weak electrical currents (transcranial electrical stimulation, tES) is known already for about 60 years as a technique to generate modifications of cortical excitability and activity. Originally established in animal models, it was developed as a noninvasive brain stimulation tool about 20 years ago for application in humans. Stimulation with direct currents (transcranial direct current stimulation, tDCS) induces acute cortical excitability alterations, as well as neuroplastic after-effects, whereas stimulation with alternating currents (transcranial alternating current stimulation, tACS) affects primarily oscillatory brain activity but has also been shown to induce neuroplasticity effects. Beyond their respective regional effects, both stimulation techniques have also an impact on cerebral networks. Transcranial magnetic stimulation (TMS) has been pivotal to helping reveal the physiological effects and mechanisms of action of both stimulation techniques for motor cortex application, but also for stimulation of other areas. This chapter will supply the reader with an overview about the effects of tES on human brain physiology, as revealed by TMS.

scholarly journals Transcranial alternating current stimulation of α but not β frequency sharpens multiple visual functions

2020 ◽  
Vol 13 (2) ◽  
pp. 343-352 ◽  
Author(s):  
Hisato Nakazono ◽  
Katsuya Ogata ◽  
Akinori Takeda ◽  
Emi Yamada ◽  
Takahiro Kimura ◽  
...  
Keyword(s):  
Alternating Current ◽  
Visual Functions ◽  
Transcranial Alternating Current Stimulation ◽  
Stimulation Of

NMDA Receptor-Mediated Motor Cortex Plasticity After 20 Hz Transcranial Alternating Current Stimulation

2018 ◽  
Vol 29 (7) ◽  
pp. 2924-2931 ◽  
Author(s):  
M Wischnewski ◽  
M Engelhardt ◽  
M A Salehinejad ◽  
D J L G Schutter ◽  
M -F Kuo ◽  
...  
Keyword(s):  
Motor Cortex ◽  
Primary Motor Cortex ◽  
Cortical Excitability ◽  
Alternating Current ◽  
Beta Oscillations ◽  
Human Motor Cortex ◽  
After Effects ◽  
Transcranial Alternating Current Stimulation ◽  
Human Motor ◽  
Motor Cortex Plasticity

Abstract Transcranial alternating current stimulation (tACS) has been shown to modulate neural oscillations and excitability levels in the primary motor cortex (M1). These effects can last for more than an hour and an involvement of N-methyl-d-aspartate receptor (NMDAR) mediated synaptic plasticity has been suggested. However, to date the cortical mechanisms underlying tACS after-effects have not been explored. Here, we applied 20 Hz beta tACS to M1 while participants received either the NMDAR antagonist dextromethorphan or a placebo and the effects on cortical beta oscillations and excitability were explored. When a placebo medication was administered, beta tACS was found to increase cortical excitability and beta oscillations for at least 60 min, whereas when dextromethorphan was administered, these effects were completely abolished. These results provide the first direct evidence that tACS can induce NMDAR-mediated plasticity in the motor cortex, which contributes to our understanding of tACS-induced influences on human motor cortex physiology.

P 154. State dependent effects of transcranial alternating current stimulation of the motor system: What you think matters

2013 ◽  
Vol 124 (10) ◽  
pp. e137-e138
Author(s):  
M. Feurra ◽  
P. Pasqualetti ◽  
G. Bianco ◽  
E. Santarnecchi ◽  
A. Rossi ◽  
...  
Keyword(s):  
Motor System ◽  
Alternating Current ◽  
State Dependent ◽  
Transcranial Alternating Current Stimulation ◽  
Stimulation Of

scholarly journals Closed-loop transcranial alternating current stimulation of slow oscillations

2015 ◽  
Vol 1 (1) ◽  
pp. 85-88 ◽  
Author(s):  
Christian Wilde ◽  
Ralf Bruder ◽  
Sonja Binder ◽  
Lisa Marshall ◽  
Achim Schweikard
Keyword(s):  
Closed Loop ◽  
Alternating Current ◽  
Electrical Measurements ◽  
Slow Oscillations ◽  
Non Invasive ◽  
Transcranial Alternating Current Stimulation ◽  
Novel Method ◽  
Endogenous Activity ◽  
Stimulation Of

AbstractTranscranial alternating current stimulation (tACS) is an emerging non-invasive tool for modulating brain oscillations. There is evidence that weak oscillatory electrical stimulation during sleep can entrain cortical slow oscillations to improve the memory consolidation in rodents and humans. Using a novel method and a custom built stimulation device, automatic stimulation of slow oscillations in-phase with the endogenous activity in a real-time closed-loop setup is possible. Preliminary data from neuroplasticity experiments show a high detection performance of the proposed method, electrical measurements demonstrate the outstanding quality of the presented stimulation device.

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