The human brain is one of the most remarkable organs in the body, and its electrical activity is truly astonishing. While you might think of electricity as something that comes from power plants, your brain is actually generating electrical signals constantly.
Neurons in the brain communicate through electrical impulses. When these neurons fire, they create tiny electrical currents. With approximately 86 billion neurons in the average human brain, all firing at different rates, the combined electrical activity is significant.
Scientists estimate that the brain generates about 10-23 watts of electrical power when fully active. While this might not sound like much, it’s enough to power a small LED light bulb! This electrical activity is what allows us to think, feel, remember, and process information.
The brain’s electrical activity can be measured using an electroencephalogram (EEG), which records the brain waves produced by this neural activity. Different states of consciousness produce different patterns of brain waves, from the rapid beta waves during active thinking to the slower delta waves during deep sleep.
Interestingly, the brain is incredibly efficient at using this electrical energy. Despite generating this power, the brain only uses about 20% of the body’s total energy consumption, making it one of the most energy-efficient computing systems known to humanity.