Preoptic hypnogenic focus and mesencephalic reticular formation.
D000818:Animals; D002415:Cats; D004558:Electric Stimulation; D005071:Evoked Potentials; D006990:Hypnosis; D008636:Mesencephalon / Q000502:physiology*; D009474:Neurons / Q000502:physiology; D009900:Optic Nerve / Q000502:physiology*; D012154:Reticular Formation / Q000502:physiology*