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Evoked potentials and electroencephalography in stuttering.

E Khedr1, W A El-Nasser, E K Abdel Haleem

  • 1Department of Neuropsychiatry, Faculty of Medicine, Assiut University, Assiut, Egypt.

Folia Phoniatrica Et Logopaedica : Official Organ of the International Association of Logopedics and Phoniatrics (IALP)
|April 27, 2000
PubMed
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This study found significant differences in brain activity, including visual evoked potentials and EEG patterns, in individuals who stutter. These findings suggest a potential organic basis for stuttering in children and young adults.

Area of Science:

  • Neuroscience
  • Speech and Language Pathology
  • Clinical Electrophysiology

Background:

  • Stuttering is a complex speech disorder with unclear etiopathogenesis.
  • Previous research suggests potential neurological underpinnings of stuttering.
  • Understanding electrophysiological correlates can offer insights into stuttering mechanisms.

Purpose of the Study:

  • To investigate electrophysiological factors in evoked potentials and electroencephalography (EEG) related to stuttering.
  • To compare brain activity between stuttering and non-stuttering individuals aged 6-25.
  • To explore potential organic etiopathogenesis of stuttering.

Main Methods:

  • Evaluated 37 stuttering and 25 non-stuttering subjects (age, sex, education matched).

Related Experiment Videos

  • Utilized visual evoked potentials (VEPs), auditory evoked potentials (AEPs), event-related potentials (P300), WISC-IQ, and EEG.
  • Analyzed VEP P100 amplitude, AEP latencies, event-related potentials, and EEG dominant rhythm and abnormalities.

    • Main Results:

    • Stutterers showed reduced VEP P100 amplitude and prolonged AEP latencies (I, III, V, I-III, I-V).
    • No significant abnormalities in event-related potentials (P200, N200, P300) were found.
    • Stutterers exhibited slower dominant EEG rhythm, significant interhemispheric asymmetry, and higher rates of pathological EEG (54%) including epileptiform activity (16.2%).

    Conclusions:

    • Electrophysiological abnormalities in VEPs and AEPs are associated with stuttering.
    • EEG findings indicate altered brain activity and asymmetry in stutterers.
    • The observed neurophysiological differences suggest a possible organic basis for stuttering.