For those who stutter, this research is big news: Three genetic mutations have been identified in the brains of people who stutter, located in the part of the brain where speech is controlled. It's not a cure, and may not be the only cause, but finding any source for stuttering is what's significant, researchers say. From the CNN story:
Roughly 3 million people in the United States stutter, according to the National Institutes of Health. About 60 percent of those with the disorder have a family member who also stutters. The condition is most common among children, although about 1 percent of people carry the condition through adulthood, according to the Stuttering Foundation of America.
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