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. Author manuscript; available in PMC: 2015 Nov 1.
Published in final edited form as: Brain Stimul. 2014 Jul 19;7(6):890–899. doi: 10.1016/j.brs.2014.07.034

Figure 4.

Figure 4

Effects of high frequency stimulation with duration of 20 seconds. A. 50 Hz stimulation causes similar suppression percentages along with time. B. Suppression percentage drops in the latter portion of stimulation period. C. Suppression percentage drops and becomes negative in the latter portion of stimulation because high frequency activity is induced. D and E. Suppression percentages at 50 and 20 Hz stimulation with high and medium power levels drop within 11 seconds and remain low. *, significant difference among different time intervals, p<0.05.