Nikolas
Created page with "There are two major regulatory nervous systems in the body, the parasympathetic and the sympathetic. The heart is innervated by both systems. The two systems have mostly opposite effects. We usually think of the parasympathetic and sympathetic systems as being either “on” or “off”, but that’s not the case. Both systems can be active anywhere from 0% to 100% of full activity. == Parasympathetic activation of the heart == The major parasympathetic nerve of the..."