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. 2021 Sep 27;15:693207. doi: 10.3389/fnhum.2021.693207

Figure 1.

Figure 1

Proposed design for temporal interference magnetic stimulation on a hemispherical model. (A) The construction of the stimulation coils and the isotropic head model. A clover-shaped coil array constructed with an inner diameter of 60 mm and an outer diameter of 100 mm. Coils with identical color comprise a “temporal interference set” and are aligned on the same planes at vertical distances of 5 mm and 10 mm above the hemispherical model. (B) Feasibility of generating a low-frequency modulation from the four individual waves with a normalized intensity of 1(frequency of 1, 1.01 kHz, 5, and 5.01 kHz, respectively). A time length of 1 s was displayed, and a 10 Hz envelope was observed. (C) Same modulation wave with (B) but with a time length of 50 ms.