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The effect of TMAS repetition frequencies on a single STN discharge. Columns 1–3 ultrasonic pulse repetition frequencies fs = 5, 10 and 20 Hz, rows 1–4 are the upper, lower half sine wave, sine wave and offset sine wave stimulation, the blue and black curves are STN membrane potential and TMAS-induced current, (I1) is the curve of STN neuron firing rate versus TMAS repetition frequency (f = 0.5 MHz, I0 = 0.1 W⋅cm– 2, T1/Ts = 50%, B = 0.3 T).
