Brain and auto safety experts fear that 16-year-olds, the youngest drivers licensed in most states, are too immature to handle today's cars and roadway risks. New findings from brain researchers at the National Institutes of Health (news - web sites) explain for the first time why efforts to protect the youngest drivers usually fail. The weak link: what's called "the executive branch" of the teen brain - the part that weighs risks, makes judgments and controls impulsive behavior. Scientists at the NIH campus in Bethesda, Md., have found that this vital area develops through the teenage years and isn't fully mature until age 25. One 16-year-old's brain might be more developed than another 18-year-old's, just as a younger teen might be taller than an older one. But evidence is mounting that a 16-year-old's brain is generally far less developed than those of teens just a little older. (Author/publisher)
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