Medical Bits

<p>The human brain is an incredibly dynamic, adaptable network of roughly ninety billion neurons that continuously rewires itself through our daily experiences, sleep quality, and individual lifestyle choices. This article reframes cognitive health as a lifelong project, tracing the brain's long evolutionary history alongside key biological milestones such as the first rise of oxygen. It introduces the vital clinical concept of cognitive reserve, the brain's functional resilience to tolerate pathology, built through education, language study, complex occupations, and rich social engagement. To protect this reserve, the author outlines critical lifestyle pillars: prioritizing quality sleep to facilitate metabolic clearance, correcting...