pacemaker action potential pacemaker action potential a pacemaker action potential is the kind of action potential that provides a reference rhythm for the network. this contrasts with pacemaker potential or current which drives rhythmic modulation of firing rate. some pacemaker action generate rhythms for the heart beat (sino-atrial node) or the circadian rhythm in the suprachiasmatic nucleus. this article is issued from wikipedia. the text is licensed under creative commons - attribution - sharealike. additional terms may apply for the media files.