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. Author manuscript; available in PMC: 2019 Dec 3.
Published in final edited form as: J Neural Eng. 2018 Oct 2;16(1):016026. doi: 10.1088/1741-2552/aae590

Figure 4.

Figure 4.

(A) Cathode- and anode- first stimulus regimes with varying charge-balancing phases of 100%, 50%, 25%, 10%, 5%, and 2.5% of the leading phase amplitude. (B) Strength duration curve for the charge-balancing phase for passing fibers (blue) or orthogonal fibers (red) for neurons 3 mm away from the contact center. (C) Cathode-first stimulation with varying amplitudes of the anodic charge balancing phase. Changes to the balancing either select against or in favor of orthogonally oriented fibers (third eigenvector). (D) Anode-first stimulation with varying amplitudes of the charge-balancing phase. Orthogonal fibers are highly excitable in all anode-first waveform scenarios.