Fig. 10. Responses of salivary neurones, SN1 (A) and SN2 (B), to peppermint (hatched bars) and vanilla (shaded bars) odours before and at 5 min and 30 min after five sets of P+V- forward-pairing trials. The responses are shown as means ± s.e.m. The results of statistical comparison are shown above the bars (NS, P>0.05, ^*P<0.05, ^**P<0.01, ^***P<0.001; WCX-test in Fig. 8B; t-test in Fig. 8B).