Your Brain Is Still Affected by Sleep You Missed Two Weeks Ago Neuroscience research shows that sleep deprivation doesn’t reset overnight. Your brain can remain affected by poor sleep from up to two weeks earlier, impacting memory, focus, mood, and decision-making. This explains why chronic sleep loss silently degrades performance—even after a few “good nights.” Important Details: • Brain effects last up to 2 weeks • Impacts memory and focus • Affects mood and judgment • Not fully reversed by sh