A Discussion of tACS Literature
BOLD signal effects of transcranial alternating current stimulation (tACS) in the alpha range: a concurrent tACS–fMRI study
Vosskuhl, Johannes, René J Huster, and Christoph S Herrmann. 2016. 'BOLD signal effects of transcranial alternating current stimulation (tACS) in the alpha range: a concurrent tACS–fMRI study', Neuroimage, 140: 118-25.
Summary: Alpha oscillations are shown to correlate with a reduction in neural activity. However, no prior study demonstrated that alpha frequency transcranial alternative current stimulation (tACS) can reduce neural activity. Vosskuhl et al. deliver alpha frequency tACS to occipital cortex with concurrent fMRI during a visual attention task. In the task, alpha oscillations were hypothesized to decrease and therefore drive an increase in neural activity measured with fMRI. Alpha-tACS resulted in a decrease in task-evoked neural activity. These findings provide causal evidence that alpha-tACS decreases focal neural activity.
Contributed by: Justin Riddle, PhD
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Every week, there are new and exciting scientific papers published on studies that investigated tACS. Reading and understanding these papers unfortunately requires both access to (sometimes quite expensive) scientific journals and in-depth "insider knowledge." Our goal is to share with you brief summaries of tACS studies that give you a big-picture idea of what the publications are about. There are too many studies to feature all of them but we will continuously update this page. If you have a specific study you would like to get featured, please contact us. The contributors are personnel from the Frohlich Lab and the Carolina Center for Neurostimulation.