Abstract
Abstract Stuttering is a speech disorder with frequent and protracted prolongations, repetitions, and silent blocks that hamper proper speech production. It develops during the preschool years with a prevalence of 5%, decreasing to 1% in adulthood to be referred to as persistent developmental stuttering. Auditory processing deficit is proposed to be one of the contributing factors to developmental stuttering. This study aimed to determine the pattern of auditory processing affection if any in stuttering disorder. This might be helpful for improving management approaches in the future. Eleven adults with persistent developmental stuttering and 11 comparative age-matched normally fluent participants were examined with auditory brainstem response (ABR) and mismatch negativity to evaluate the brainstem and cortical processing of speech syllables, respectively. All participants exhibited normal brainstem processing of nonspeech (click) stimuli, whereas 72.7% of stutterers revealed prolongation of peak latency of all waves of speech-evoked ABR. An additional peak latency delay of mismatch negativity response was found in 81.8% of stutterers. Auditory processing abnormality is proposed to be the underlying deficit in a subset of stutterers.
Highlights
Stuttering is a speech disorder with abnormal frequency or duration of interruptions in verbal fluency, manifesting as repetitions, prolongations, hard attack, or blocks that interfere with efficient speech production [1]
The most common form of stuttering is developmental stuttering. It usually evolves in about 5% of children between 2 and 6 years of age.About 20% of those children continue to stutter during adulthood and the problem is referred to as persistent developmental stuttering (PSD) [4]
The speech-evoked auditory brainstem response (sABR) waves were identifiable at all times (100%) in both groups
Summary
Stuttering is a speech disorder with frequent and protracted prolongations, repetitions, and silent blocks that hamper proper speech production. It develops during the preschool years with a prevalence of 5%, decreasing to 1% in adulthood to be referred to as persistent developmental stuttering. Auditory processing deficit is proposed to be one of the contributing factors to developmental stuttering
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