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Neural systems for sentence processing in stuttering.

C Weber-Fox1

  • 1Purdue University, Department of Audiology & Speech Sciences, West Lafayette, IN 47907, USA. weberfox@purdue.edu

Journal of Speech, Language, and Hearing Research : JSLHR
|August 28, 2001
PubMed
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Individuals who stutter show different brain activity during silent reading, indicating atypical neural processing for language. These neurolinguistic differences may underlie stuttering, even without speech demands.

Area of Science:

  • Neuroscience
  • Linguistics
  • Speech-language pathology

Background:

  • Stuttering is a complex disorder affecting speech fluency.
  • Neurolinguistic factors and atypical neural processing are potential contributors to stuttering.
  • Previous research suggests potential differences in language processing in individuals who stutter (IWS).

Purpose of the Study:

  • To investigate neurolinguistic factors in stuttering by examining neural functions during silent language processing.
  • To determine if individuals who stutter (IWS) exhibit atypical neural functions for language processing, independent of speech production.
  • To compare event-related brain potentials (ERPs) between IWS and normally fluent speakers (NS) during silent sentence reading.

Main Methods:

  • Event-related brain potentials (ERPs) were recorded from 9 IWS and 9 NS during silent reading.

Related Experiment Videos

  • ERPs were elicited by closed-class words, open-class words, and semantic anomalies.
  • Standardized tests assessed grammatical and lexical abilities in comprehension and production.

    • Main Results:

    • Standardized tests showed comparable grammatical and lexical abilities between IWS and NS.
    • ERPs revealed differences in functional brain organization for linguistic processing in IWS.
    • IWS exhibited reduced negative amplitudes (N280, N350, N400) in the 200-450 ms window after word onset.

    Conclusions:

    • Atypical neural processing for language exists in individuals who stutter, even during silent reading.
    • These neurolinguistic differences may involve shared underlying processes for lexical access and are common across word classes.
    • The findings suggest that altered neural functions contribute to the disorder of stuttering.