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. Author manuscript; available in PMC: 2017 Sep 1.
Published in final edited form as: J Opt. 2016 Aug 18;18(9):093007. doi: 10.1088/2040-8978/18/9/093007

Figure 2.

Figure 2

Comparison of fluorescence signals recorded simultaneously from a GECI, GCaMP6f, and a GEVI, QuasAr2, expressed as a fusion construct in a rat hippocampal neuron. Sub-threshold depolarizations, indicated by the arrows, do not have a correlate in the Ca2+ signal. Rapid spike trains manifest as a broad increase in Ca2+ concentration.