title: Effects of estrus, estrogen-progesterone priming, and vaginal stimulation on tonic immobility, dorsal immobility, and lordosis in the female rat.
abstract: Three complex inhibitory responses, tonic immobility, the dorsal immobility response, and lordosis, were studied in the intact female rat during estrus and diestrus and in ovariectomized rats with estrogen-progesterone treatment or controls. In each condition, the effects of vaginal-cervical stimulation were also studied. The results of two experiments indicate that estrus and estrogen-progesterone treatment significantly potentiate lordosis and the dorsal immobility response with or without vaginal-cervical stimulation. Tonic immobility was also potentiated by estrus and estrogen-progesterone treatment, but only if vaginal-cervical stimulation was applied. Vaginal-cervical stimulation potentiated both tonic immobility and the dorsal immobility response, but not lordosis, which was already at a high level.
mesh_terms: D000818:Animals; D001921:Brain / Q000502:physiology; D002584:Cervix Uteri / Q000502:physiology*; D004298:Dopamine / Q000502:physiology; D004958:Estradiol / Q000494:pharmacology; D005260:Female; D012739:Gonadal Steroid Hormones / Q000502:physiology*; D009068:Movement; D011187:Posture; D011374:Progesterone / Q000494:pharmacology; D051381:Rats; D012726:Sexual Behavior, Animal / Q000502:physiology*; D014621:Vagina / Q000502:physiology
chemical_list: D012739:Gonadal Steroid Hormones; D011374:Progesterone; D004958:Estradiol; D004298:Dopamine