Fig. 3.

Serotonin in the IC parallels the valence of social interactions for males interacting with females. (A) Females squeak at low levels in the initial phase of interactions that proceed to mounting (light bars), but at high levels in the initial phase of interactions that do not proceed to mounting (gray bars). (B) Serotonin increases in the IC of males following the presentation of novel female partners (“interaction”) as opposed to no partner (“control”). (C) The amplitude of increases in serotonin correlate inversely with the number of female squeaks. Figures adapted from Finton etal. 2017, Anim Behav 126:163–175 (A) and Keesom and Hurley 2016, J Neurophysiol 115:1786–1796 (B, C).