Mating induces pupillary dilatation in female rats: Role of pelvic nerve

In the present study, we demonstrate that natural or artificial vaginal stimulation exerts a powerful effect on autonomic activity, as measured by pupillary diameter. Pupillary diameter was recorded approximately 3-5 sec after copulatory mounts, intromissions, ejaculations or experimenter delivered stimulation. The pupil was magnified 43X and its diameter was measured directly from a calibrated video screen. Mating tests were performed on 13 …