Figure 4

Intranasal CGRP attenuates fear memory retention via the CGRP receptor with an increase in Npas4 expression. (A) Effects of CGRP receptor antagonist BIBN4096 (1 mg/kg) on fear memory retention. (B) Effects of BIBN4096 on the levels of Npas4 protein expression. Each bar indicates the mean ± S.E.M. *p < 0.05, Tukey–Kramer test. Numbers in parentheses indicate the animal numbers for each group.