The frontal lobes are the seat of what’s sometimes called the brain’s executive function. They’re responsible for planning, for self-awareness, and for judgment. Optimally, they act as a check on impulses originating in other parts of the brain. But in the teen years, Jensen points out, the brain is still busy building links between its different regions. This process involves adding myelin around the axons, which conduct electrical impulses. (Myelin insulates the axons, allowing impulses to travel faster.) It turns out that the links are built starting in the back of the brain, and the frontal lobes are one of the last regions to get connected. They are not fully myelinated until people are in their twenties, or even thirties. This is where parents step in. “You need to be your teens’ frontal lobes until their brains are fully wired,” Jensen writes. By this she seems to mean near-constant hectoring.Read the full article: Why Teen-Agers Are the Worst - The New Yorker
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