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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.
Summary
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).
- 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.
