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. 2017 Jul 19;8(8):3700–3713. doi: 10.1364/BOE.8.003700

Fig. 5.

Fig. 5

(A) Illustration of plausible mechanistic origin of optical signal pulse (right panel) due to transient oscillation of neural cell membrane (middle panel) which is triggered by propagating action potential (B) Time-frequency analysis (continuous wavelet transform) of optical pulse train, and (C) Frequency characterization of membrane oscillation from individual optical pulse.