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Fig. 7. Action potential (AP) distribution in responses to stimulation with 10
µg bombykal. Post-stimulus-time histograms (binwidth=10 ms) for recordings
from ZT 8-11 for the beginning (A; 0-20 min), middle (B; 80-100 min) and end
of the recordings (C; 160-180 min). Both in the controls (left) as well as
under the influence of 8bcGMP (right) the first phasic part of the AP response
declined, leading to a more tonic response. Also, the numbers of APs over the
first 100 ms (insert in C) showed a significant decrease both with 8bcGMP and
in the controls. This decline was stronger in the presence of 8bcGMP. Since
the sample sizes differed for the different time windows all y-axes
were scaled to y=nx1.6 (dotted line=100 ms after the
onset of the sensillar potential). Different lower case letters in the inserts
denote significant differences between tested groups of means, which are
separated by dotted lines (ANOVA and Tukey HSD post-hoc-test; 
=0.01,
P<0.01).
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