Heart rate persons with coronary artery disease. The heart rate is rhythmically generated by the sinoatrial node. It is also influenced by central factors through sympathetic and parasympathetic nerves. Nervous influence over the heartrate is centralized within the two paired cardiovascular centres of the medulla oblongata. The cardioaccelerator regions stimulate activity via sympathetic stimulation of the cardioaccelerator nerves, and the cardioinhibitory centers decrease heart activity via parasympathetic stimulation as one component of the vagus nerve. During rest, both centers provide slight stimulation to the heart, contributing to autonomic tone. This is a similar concept to tone in skeletal muscles. Normally, vagal stimulation
The Heart of the Warrior peace conference fills Deep Space Nine with intrigue. At the same time, Kira and Worf take a mission into enemy territory to discover the secrets of the chemical that controls the highly dangerous Jem'Hadar warriors. Odo may be their only hope of survival but he'll have to fight against his own people. The Heart of the Warrior The Heart of the Warrior is a "" novel written by John Gregory Betancourt. In "Voyages of Imagination", Betancourt remarked, "Worf has always been one of my favorite characters, and I wanted to write a book about him but set in the Dominion,