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Figure 2


Fig. 2. A sample ERG trace showing the response of an isolated rhopalia to a flash of white light, 40 ms in duration, at 5.47x103 W m-2 sr-1 (ND 0.5). Peak response is taken as first peak (a), regardless of polarity. It is assumed that the first response is from photoreceptors and subsequent peaks (b) may be from downstream events.