Chapter title |
Studying Effects of Transcranial Alternating Current Stimulation on Hearing and Auditory Scene Analysis
|
---|---|
Chapter number | 39 |
Book title |
Physiology, Psychoacoustics and Cognition in Normal and Impaired Hearing
|
Published in |
Advances in experimental medicine and biology, April 2016
|
DOI | 10.1007/978-3-319-25474-6_39 |
Pubmed ID | |
Book ISBNs |
978-3-31-925472-2, 978-3-31-925474-6
|
Authors |
Lars Riecke, Riecke, Lars |
Editors |
Pim van Dijk, Deniz Başkent, Etienne Gaudrain, Emile de Kleine, Anita Wagner, Cris Lanting |
Abstract |
Recent studies have shown that perceptual detection of near-threshold auditory events may depend on the relative timing of the event and ongoing brain oscillations. Furthermore, transcranial alternating current stimulation (tACS), a non-invasive and silent brain stimulation technique, can entrain cortical alpha oscillations and thereby provide some experimental control over their timing. The present research investigates the potential of delta/theta-tACS to modulate hearing and auditory scene analysis. Detection of near-threshold auditory stimuli, which are modulated at 4 Hz and presented at various moments (phase lags) during ongoing tACS (two synchronous 4-Hz alternating currents applied transcranially to the two cerebral hemispheres), is measured in silence or in a masker. Results indicate that performance fluctuates as a function of phase lag and these fluctuations can be explained best by a sinusoid at the tACS frequency. This suggests that tACS may amplify/attenuate sounds that are temporally coherent/anticoherent with tACS-entrained cortical oscillations. |
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