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.
The Cold War Begins SECTION 1 The Origins of the Cold War SECTION 2 The Early Cold War Years SECTION 3 The Cold War and American Society SECTION 4 Eisenhower s Cold War Policies 1945 1960 1945 1950 Truman 1945 1953 Eisenhower 1953 1961 1945 Franklin Roosevelt dies 1947 Truman Doctrine is declared 1948 Berlin airlift begins 1953 Armistice agreement