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. Author manuscript; available in PMC: 2012 Oct 10.
Published in final edited form as: IEEE Trans Neural Syst Rehabil Eng. 2010 Sep 2;18(6):658–665. doi: 10.1109/TNSRE.2010.2071882

Fig. 3.

Fig. 3

Block threshold trial for a bipolar electrode with contact separation of 1.0 mm. Supramaximal twitches are delivered at ~1 Hz through the proximal electrode as designated by the black arrows. As indicated by the grey bar, the HFAC is turned on at approximately 6.5 s with an amplitude of 9.0 mA and is decremented in 0.1 mA steps until conduction block is no longer complete. The circle designates the first twitch conducted by a partially conducting nerve. Full conduction is restored by the following proximal stimulation pulse.