The Willpower Instinct: How Self-Control Works, Why It Matters, and What You Can Do To Get More of It

by Kelly McGonigal

Your prefrontal cortex, that energy-hungry area of the brain, bears the brunt of this personal energy crisis. Sleep researchers even have a cute nickname for this state: “mild prefrontal dysfunction.” Shortchange your sleep, and you wake up with temporary Phineas Gage–like damage to your brain.