Suppression of facial grooming behavior during the peak of SIA. (A, C) The total number of groom bouts after id 5-HT (N=7–12) or AITC (N=8,12) was similar between swim groups, but greater than the no swim group. (B, D) However, groom bouts were suppressed in the S-SIA groups compared to the W-SIA groups at the peak of SIA (N=7 for 5-HT groups, N=8 for AITC groups). Mean ± SEM; repeated measures ANOVA, 1-way ANOVA; Tukey post-hocs; unpaired two-tailed t-tests. *P≤0.05, **P≤0.01, ***P≤0.001 vs. no swim groups in bar graphs and vs. W-SIA groups in line graphs.