title: Arousal thresholds and tissue-electrode impedance in guinea pigs.
mesh_terms: D000818:Animals; D001143:Arousal; D002369:Castration; D002540:Cerebral Cortex / Q000502:physiology*; D004558:Electric Stimulation; D004569:Electroencephalography; D004958:Estradiol / Q000494:pharmacology; D004971:Estrus; D005260:Female; D006168:Guinea Pigs; D008636:Mesencephalon / Q000502:physiology*; D010053:Ovary / Q000502:physiology; D011247:Pregnancy; D011374:Progesterone / Q000494:pharmacology; D012154:Reticular Formation
chemical_list: D011374:Progesterone; D004958:Estradiol