Protection of cerebral vessels by sympathetic nerves.
D000818:Animals; D001812:Blood-Brain Barrier; D001921:Brain / Q000098:blood supply*; D002415:Cats; D002536:Cerebral Arteries / Q000294:innervation; D002560:Cerebrovascular Circulation; D004285:Dogs; D000882:Haplorhini; D006973:Hypertension / Q000503:physiopathology; D013564:Sympathetic Nervous System / Q000502:physiology*