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Regular version of the site

Article

Transcranial alternating current stimulation affects decision making

Frontiers in System Neuroscience. 2012. Vol. 6. P. 39.
Feurra M., Galli G., Rossi S.

Here, we aim to discuss an emerging neuromodulatory approach, transcranial Alternating Current Stimulation (tACS). tACS shares the same settings of tDCS in terms of device and montage, but differs in terms of current flow wave-form delivered trough the scalp. Unlike tDCS, tACS delivers electrical oscillatory currents at different frequency ranges according to the operator’s demands. Recent studies have shown that tACS may boost brain activity related to different functions (Marshall et al., 2006; Feurra et al., 2011a,b), presumably by entraining the ongoing oscillatory activity in a frequency-dependent manner (Thut and Miniussi, 2009). Oscillatory activity of cortical areas engaged in specific cognitive processes synchronizes at distinct frequencies during task performance, ranging from theta to the gamma band (Varela et al., 2001). This resonance-like interplay between externally applied and internally generated regional oscillatory activity may prove a powerful approach to manipulate brain activity.