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Fig. 5. (A) Learning performances [assessed by percentage of antennal projection
responses (APRs)] were tested for up to 30 min after five training trials with
simultaneous conditioning (N=18). A high percentage of APRs to the
visual cue was retained 5 min, 10 min, 20 min and 30 min after training and
showed no statistical difference in these intervals. The responses at these
times were significantly different from pre-training and control test levels,
which were not significantly different. (B) Tests for long-term memory of APRs
(N=9). After training, APRs to the green light cue were tested for up
to 72 h. APRs were significantly different from those at pre-training even at
72 h, showing that cockroaches retained this learned behavior for long
periods. The response from 30 min to 1 h decreases by almost 30% but remains
stable for up to 72 h. The response at 72 h has decreased to almost 40%, which
is half of that observed at 30 min.
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