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. Author manuscript; available in PMC: 2017 Dec 4.
Published in final edited form as: Sci Transl Med. 2016 Oct 26;8(362):362ra142. doi: 10.1126/scitranslmed.aaf5187

Fig. 5. Graphical representations of hypothesized neural response to stimulation intensity and spike frequency.

Fig. 5

(A) Recruitment of nerve fibers is hypothesized to increase with increased stimulation intensity (charge per pulse). Arrow indicates the putative location of the perceptual threshold. (B) Neural population firing rate as a function of ACR. Assuming each pulse produces one spike per activated fiber, this yields an approximately linear function. Threshold is assumed to be independent of PF (see fig. S3).