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Figure 5


Fig. 5. The time course of the response of V1 neurone to a step change in ocellar light intensity (A,B), and a sinusoidal change (C,D). (A,C) Solid black lines: instantaneous firing rates averaged over 520 stimulus cycles; horizontal red lines: corresponding post-stimulus spike time histogram (5 ms bins); broken blue line: instantaneous firing rate of spontaneous activity, obtained during periods of zero stimulation between trials. (B,C) Time course of stimuli: LED intensity difference = (left LED output-right LED output); Imax, max LED output. Stimuli were applied in 40 blocks of 15 consecutive cycles. The blocks were separated by 2.5 s. The first and last cycle of each block was discarded to give 520 cycles.





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