Figure 2 | Scientific Reports

Figure 2

From: Distinct online and offline effects of alpha and beta transcranial alternating current stimulation (tACS) on continuous bimanual performance and task-set switching

Figure 2

Transcranial alternating current stimulation. (A) Bifocal electrode montage with centre electrodes (surface area 9 cm2, diameter 3.4 cm) over C3 and C4 indicated in red, outer ring (surface area 35 cm2, inner diameter 7.5 cm, outer diameter 10 cm) indicated in blue. By using Y-connector cables, a 0° phase difference was achieved between centre electrodes (red) and between outer ring electrodes (blue). (B) Simulation of the electrical field of the bifocal centre-ring montage. Alpha (10 Hz) or beta (20 Hz) tACS was applied with a stimulation intensity of 1000 µA peak-to-peak, which resulted in a maximum electrical field strength of 0.1 mV/m with its foci over the primary sensorimotor regions of both hemispheres.

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