n01 writes: Stuttering — a speech disorder in which sounds, syllables or words are repeated or prolonged — affects more than 70 million people, or about 1% of the population, worldwide. Once treated as a psychological or emotional condition, stuttering can now be traced to brain neuroanatomy and physiology. Two new studies from UC Santa Barbara researchers provide insight into the treatment of the speech disorder as well as understanding its physiological basis. The first paper, published in the American Journal of Speech-Language Pathology, finds that the MPI stuttering treatment program, a new treatment developed at UCSB, was twice as effective as the standard best practices protocol. The second study, which appears in the Journal of Speech, Language, and Hearing Research, uses diffusion spectrum imaging (DSI) in an MRI scanner to identify abnormal areas of white matter in the brains of adult stutterers. According to co-author Janis Ingham, a professor emerita of speech and hearing sciences at UCSB and co-author of both papers, the two studies taken together demonstrate two critical points: A neuroanatomic abnormality exists in the brains of people who stutter, yet they can learn to speak fluently in spite of it.
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