During training, the response to the ginger food odor combined with CS 2 showed a trend towards being greater than that evoked by presentation of the ginger food odor alone (paired t -test, t 84 = 1.81, p = 0.074, 10.4% ± 2.7—Figure 3C ).
The proportion of single neurons showing increased activity in response to the ginger food odor after training showed a trend towards significance (29/85, 34% before and 39/85, 46%—McNemar test, p = 0.123) as well as during the training period when ginger was presented with CS 2 (40/85, 47%, p = 0.1).