Optimized auditory transcranial alternating current stimulation improves individual auditory temporal resolution

Brain Stimulation
Alina BaltusChristoph Siegfried Herrmann

Abstract

Temporal resolution of cortical, auditory processing mechanisms is suggested to be linked to peak frequency of neuronal gamma oscillations in auditory cortex areas (individual gamma frequency, IGF): Individuals with higher IGF tend to have better temporal resolution. Modulating ongoing gamma activity with transcranial alternating current stimulation (tACS) is expected to improve performance in gap detection (GD) tasks (shorter GD thresholds) if the frequency is higher and to decrease GD performance (longer GD thresholds) if the frequency is lower than IGF. For 26 healthy participants the IGF and temporal resolution were identified using an auditory steady state response (ASSR) paradigm and a between-channel GD task. Finite element modelling was used to generate an optimized tACS electrode montage (one channel per hemisphere: FC5-TP7/P7 and FC6-TP8/P8). Afterwards, GD thresholds were examined during tACS (tACS frequency group A: above IGF, tACS frequency group B: below IGF). Relative changes of GD thresholds were compared between groups. Additionally, effects of tACS on oscillatory activity were investigated comparing relative changes of ASSR amplitudes before and after stimulation. Performance of group-A-participants improved s...Continue Reading

Citations

May 14, 2018·The European Journal of Neuroscience·Alina BaltusChristoph Siegfried Herrmann
Feb 8, 2019·The Neuroscientist : a Review Journal Bringing Neurobiology, Neurology and Psychiatry·Yuranny Cabral-Calderin, Melanie Wilke
Mar 12, 2019·Human Brain Mapping·Giovanni PellegrinoHartwig Roman Siebner
Jun 12, 2018·Frontiers in Human Neuroscience·Johannes VosskuhlChristoph S Herrmann
Jul 28, 2020·Frontiers in Systems Neuroscience·Inga Griskova-BulanovaJovana Bjekic
Oct 14, 2020·The European Journal of Neuroscience·Florian H Kasten, Christoph S Herrmann
Apr 3, 2020·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Daniel Strüber, Christoph S Herrmann
Jun 3, 2021·Journal of Personalized Medicine·Vykinta ParciauskaiteInga Griskova-Bulanova
Apr 13, 2021·The Journal of Pain : Official Journal of the American Pain Society·Elisabeth S MayMarkus Ploner
Dec 8, 2021·The Neuroscientist : a Review Journal Bringing Neurobiology, Neurology and Psychiatry·Joachim GrossCarsten Wolters

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