P300 event-related potentials in stutterers and nonstutterers

Author(s): Cranford, J. L., Burk, K.

Journal/Book: J Speech Lang Hear Res. 1997; 40: 10801 Rockville Pike, Rockville, MD 20852-3279. Amer Speech-Language-Hearing Assoc. 1334-1340.

Abstract: This study investigated possible differences between adult stutterers and nonstutterers in the P300 event-related potential. Responses to tonal stimuli were recorded from electrodes placed over the left (C3) and right (C4) hemispheres. The two groups exhibited different patterns of interhemispheric activity. Although all 8 participants in the fluent group exhibited P300s that were higher in amplitude over the right-hemisphere, 5 of the 8 disfluent participants had higher amplitude activity over the left hemisphere. These results provide evidence that stutterers and nonstutterers may exhibit differences between hemispheres in the processing of some types of nonlinguistic (tonal) stimuli.

Note: Article Cranford JL, E Carolina Univ, Dept Commun Sci, Greenville,NC 27858 USA

Keyword(s): stuttering; event-related potentials; P300; fluency; electrophysiology; POSITRON EMISSION TOMOGRAPHY; HEMISPHERIC ASYMMETRY; ALPHA-ASYMMETRIES

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