On the presence of serotonin in cerebrovascular sympathetic nerves and the interaction with noradrenaline at specific receptors mediating vasoconstriction.
D000818:Animals; D001921:Brain / Q000098:blood supply; D006168:Guinea Pigs; D000882:Haplorhini; D009638:Norepinephrine / Q000378:metabolism; D051381:Rats; D011985:Receptors, Serotonin / Q000378:metabolism; D012701:Serotonin / Q000378:metabolism*; D013564:Sympathetic Nervous System / Q000378:metabolism*; D014661:Vasoconstriction
D011985:Receptors, Serotonin; D012701:Serotonin; D009638:Norepinephrine