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 bandmate Nick Mason performed as guest drummer on the track for two nights at London's Wembley Arena, the first indication of a reconciliation following the acrimonious split of the mid-1980s. It was also performed at Waters' 2006–2008 tour. In 2016, Waters performed the song again on his concerts at the Zocalo Square and Foro Sol in Mexico, as well as the Desert Trip festival in the United States, but it was dropped from the setlist of his 2017 "Us + Them" Tour. The song was played by Nick Mason's Saucerful of Secrets in 2018. Set the Controls for the Heart