bioelectric potential

Bioelectricity refers to the electric potentials and currents produced by living organisms. These bioelectric potentials are generated through various biological processes and typically range from one to a few hundred millivolts. While most bioelectric currents involve the flow of ions, some organisms, like the electric eel, can generate significant electrical discharges of hundreds of volts.1

Historically, the study of bioelectricity dates back to ancient observations of electric fish and gained scientific importance through the experiments of Luigi Galvani and Alessandro Volta in the 18th century. Today, measuring bioelectric potentials is a common practice in clinical medicine, particularly for monitoring the electrical activity of the heart and brain for diagnostic purposes.1

In living cells, bioelectric potentials are created by differences in ion concentrations across the cell membrane. This difference, known as the resting potential, is crucial for cellular functions. Specialized cells, such as nerve and muscle cells, use these potentials to transmit information via electrical pulses or to facilitate muscle contraction. Some fish have evolved specialized organs, called electroplaques, to generate powerful electric discharges for defense or hunting.1