Electrophysiological mapping is a research technique that involves measuring and recording the electrical activity of the body, typically the brain or heart, in order to create a map of its functioning. This technique is commonly used in neuroscience and cardiology to study the electrical patterns and signals that underlie various functions and activities. By analyzing these electrical signals, researchers can better understand how different regions of the brain or heart work together and how they may be affected by various conditions or diseases. Electrophysiological mapping often involves the use of electrodes and specialized equipment to accurately measure and record electrical activity in real time.