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. Author manuscript; available in PMC: 2012 Mar 5.
Published in final edited form as: Proc SPIE Int Soc Opt Eng. 2009 Jan 1;7174:71741C. doi: 10.1117/12.809428

Fig. 3.

Fig. 3

(a) Optical and (b) electrical responses to increasing current levels of sural nerve stimulation. The two curves in panel (a) refer to the two wavelengths measured (690 and 830 nm), with the stronger, or more negative, response observed at 690 nm.