HealthJuly 13, 2026
cortex
/ˈkɔːrtɛks/
Definition
The outer layer of the brain, specifically the prefrontal area, which governs complex cognitive functions like decision-making, impulse control, and emotional regulation.
Etymology
Derived directly from the Latin word 'cortex,' meaning 'bark' or 'shell.' In anatomy, the term was adopted to describe the outer covering of an organ, similar to how bark covers a tree.
In the news
The article uses this term to explain why teens struggle to limit screen time, as the part of their brain responsible for self-control is still under development. Understanding this biological limitation helps parents realize why external boundaries are necessary.
Two teen counselors warn of mental health effects of too much screen time
Read the full article ↗Spectrum News 13