Descending connections from hypothalamus.
D000818:Animals; D001341:Autonomic Nervous System / Q000033:anatomy & histology; D001522:Behavior, Animal; D002415:Cats; D007031:Hypothalamus / Q000033:anatomy & histology*; D008636:Mesencephalon / Q000033:anatomy & histology; D009410:Nerve Degeneration; D011149:Pons / Q000033:anatomy & histology; D012154:Reticular Formation / Q000033:anatomy & histology