40Hz-Transcranial alternating current stimulation (tACS) selectively modulates speech perception

International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology
Katharina S RufenerMartin Meyer

Abstract

The present study investigated the functional relevance of gamma oscillations for the processing of rapidly changing acoustic features in speech signals. For this purpose we analyzed repetition-induced perceptual learning effects in 18 healthy adult participants. The participants received either 6Hz or 40Hz tACS over the bilateral auditory cortex, while repeatedly performing a phoneme categorization task. In result, we found that 40Hz tACS led to a specific alteration in repetition-induced perceptual learning. While participants in the non-stimulated control group as well as those in the experimental group receiving 6Hz tACS considerably improved their perceptual performance, the application of 40Hz tACS selectively attenuated the repetition-induced improvement in phoneme categorization abilities. Our data provide causal evidence for a functional relevance of gamma oscillations during the perceptual learning of acoustic speech features. Moreover, we demonstrate that even less than twenty minutes of alternating current stimulation below the individual perceptual threshold is sufficient to affect speech perception. This finding is relevant in that this novel approach might have implications with respect to impaired speech process...Continue Reading

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Citations

Mar 26, 2016·Frontiers in Cellular Neuroscience·Kai HeimrathTino Zaehle
May 14, 2018·The European Journal of Neuroscience·Alina BaltusChristoph Siegfried Herrmann
May 20, 2020·Journal of Cognitive Neuroscience·Anne KösemLars Riecke
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Jul 31, 2018·Frontiers in Neuroscience·Jamila AndohRobert J Zatorre
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Jun 24, 2017·Frontiers in Cellular Neuroscience·Katharina S RufenerTino Zaehle
Sep 21, 2017·Frontiers in Cellular Neuroscience·Amir V Tavakoli, Kyongsik Yun
Jan 10, 2020·Brain and Language·Thomas HouwelingAlexis Hervais-Adelman
Apr 3, 2020·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Daniel Strüber, Christoph S Herrmann
Apr 17, 2020·Neuroscience and Biobehavioral Reviews·Boris GourévitchJos J Eggermont
May 22, 2021·Brain and Behavior·Willy SerniclaesJuan L Luque

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