The ontogenesis of the spontaneous electrical activity of the lower brain stem.
D000200:Action Potentials; D000818:Animals; D004594:Electrophysiology; D005260:Female; D005333:Fetus; D006168:Guinea Pigs; D008636:Mesencephalon / Q000196:embryology / Q000502:physiology*; D010507:Periodicity; D011149:Pons / Q000196:embryology / Q000502:physiology*; D011247:Pregnancy