Analgesia produced by brain stimulation: evidence of a prolonged onset period.
D000698:Analgesia; D000818:Animals; D001522:Behavior, Animal; D002415:Cats; D004558:Electric Stimulation; D008636:Mesencephalon / Q000502:physiology*; D010465:Perception; D012154:Reticular Formation / Q000502:physiology*; D013997:Time Factors