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. Author manuscript; available in PMC: 2018 Apr 1.
Published in final edited form as: Med Biol Eng Comput. 2016 Jul 1;55(4):585–593. doi: 10.1007/s11517-016-1539-0

Fig. 4.

Fig. 4

Recovery of the muscle twitch response after a long duration (1–4 minutes) of high-frequency biphasic stimulation at 2 times threshold intensity (2T) for completely blocking the nerve conduction. The thick black lines under the trace indicate the duration of different stimulations. The 0.5 Hz muscle twitch responses induced by Stim.A were completely blocked by the 5 kHz stimulation at Stim.B. A. The response recovered partially and abruptly. B. In another experiment, the response recovered gradually. C. A very long (4 minutes) stimulation can induce a complete post-stimulation block lasting 3.5 minutes followed by a partial post-stimulation block lasting for many minutes.