11. Comparing Brain Energy Use to Computers
The brain’s constant background activity is much like a computer’s operating system running vital processes behind the scenes. Just as computers allocate significant resources to system maintenance, virus protection, and memory management—even when no programs are open—our brains devote energy to essential mental functions, regardless of conscious effort. This analogy helps illustrate why “unused” brain power is a myth: much of our neural activity is simply working beneath our awareness, sustaining cognition and readiness at all times.