We're going to discuss the generation of an action potential in cardiac muscle cells. Now, cardiac muscle cells are also known as cardiac myosides, where the word myocide simply we means a muscle cell. Now, cardiac myocides can generate an action potential as a result of three things. They can either be stimulated by a neuron, they can either be stimulated by a nearby muscle cell. So if a nearby muscle cell generates an action potential, that action potential can propagate two adjacent muscle cells as a result of the gap junctions found between cells. And the third reason is something called myogenic activity.