Autonomic outflow from the medulla is divided principally into sympathetic and parasympathetic (vagal) branches. Efferent fibers of these autonomic nerves travel to the heart and blood vessels where they modulate the activity of these target organs. The heart is innervated by vagal and sympathetic fibers.
Best Answer: The cold war didn't have a specific start or ending time but if i had to give one I'd say that it started right after WWII (1945) and ended in the early 90's, probably 1991, the fall of the Soviet Union. Source(s): xzorion54 Â· 9 years ago.
Engaged in a war that many viewed as having no way to win, U.S. leaders lost the American public's support for the war. Since the end of the war, the Vietnam War has become a benchmark for what not to do in all future U.S. foreign conflicts. Dates of the Vietnam War: 1959 -- April 30, 1975.