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The present paper integrates the results of experimental studies in which cognitive differences between stuttering and nonstuttering adults were investigated. In a monitoring experiment it was found that persons who stutter encode semantic information more slowly than nonstuttering persons. In dual-task experiments the two groups were compared in overt word-repetition and sentence-production experiments.
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What causes stuttering?
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- What causes stuttering?.
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Citations Publications citing this paper. Semantic and phonological activation electrified: Brain electrophysiological correlates of masked picture priming in fluent and stuttering adults Francine I Aisenberg , Kalie B Morries. The efficiency of attentional networks in children who stutter. Family studies also have demonstrated a clear genetic inheritance pattern spanning various generations.
Up to 75 percent of persons who stutter have family members who stutter or who have stuttered in the past. Atypical motor patterns in person who stutter can be observed not only during moments of disfluencies, but also during perceptually fluent speech, suggesting the presence of a pervasive underlying speech motor control deficiency. A number of investigations also have provided evidence that the motor control problems are not limited to oral articulatory movements but may extent to sequential movements executed by the fingers, hands and limbs as well.
Recently a number of research groups, including the one in our lab, have started to use modern functional neuroimaging technology such as positron emission tomography PET and functional magnetic resonance imaging fMRI to investigate differences in neural activation between people who stutter and those who do not. The results from these investigations have revealed some interesting differences in how the brain is active in people with stuttering difficulties.
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Stuttering individuals typically show a general overactivation of the neural systems involved in motor control, including the cerebellum. Many of these neural systems are known to cause difficulties with speech motor control and disruptions of speech fluency in patients who suffer damage to these areas.
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Conditions that enhance fluency, such as speaking in unison with someone else or behavioural fluency treatment, seem to result in a partial normalization of the activation in these cortical and subcortical regions. Research is currently underway to analyze these observed activation differences in more detail. Undoubtedly, this work will yield a better understanding of how brain processes are involved in the control of speech fluency.
More importantly, it could clarify what deficiencies in these processes, either at the system or cellular level, or both, result in stuttering. We already know that intervention early in the development of stuttering can be very effective, whereas treatment at an older age is often much more difficult and prone to relapse. A better understanding of the brain processes underlying fluency disorders should allow us to develop more effective intervention tools for the treatment of this often devastating speech disorder.
Amsterdam: Elsevier Science Conture, Edward, Stuttering: Its Nature, Diagnosis, and Treatment. De Nil, L.
Research Overview | Moody College of Communication | The University of Texas at Austin
See Terms for more information. The book is written for fluency specialists and graduate students in programs of fluency disorders.
It will also be valuable for the clinicians who wish to upgrade their skills in treating fluency disorders. Contact 07 online qbd.