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
Set the Controls for the Heart of the Sun Set the Controls for the Heart of the Sun "Set the Controls for the Heart of the Sun" is a song by the English rock band Pink Floyd. It appeared on their second album, "A Saucerful of Secrets" (1968). It was written by Roger Waters and features a drum part by Nick Mason played with timpani mallets. The track was planned for release as a single, with "Scream Thy Last Scream", on 8 September, before it was vetoed by the band's record company, EMI. The song was regularly performed between 1967 and 1973 and can be heard on the live