How Does Continuous Stimulation With Alternating Currents Alter Event-Related Brain Oscillations?

Material below summarizes the article Facilitated Event-Related Power Modulations During Transcranial Alternating Current Stimulation (tACS) Revealed by Concurrent tACS-MEG, published on June 25, 2018, in eNeuro and authored by Florian H. Kasten, Burkhard Maess, and Christoph S. Herrmann.
Relationships between brain oscillations and human cognition are traditionally performed using imaging modalities, such as magneto- or electroencephalography (M/EEG). For almost a century, these methods were successfully used to identify oscillatory brain activity within different frequency bands and associate them with numerous cognitive functions, as well as several neurological and psychiatric disorders.
However, as these methods provide observational data, inference about relationships between brain oscillations and cognition remains mostly correlational.
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