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Updated: Mar 12, 2026

Disruption of Frontal Lobe Neural Synchrony During Cognitive Control by Alcohol Intoxication

Disruption of Frontal Lobe Neural Synchrony During Cognitive Control by Alcohol Intoxication

Published on: February 6, 2019

Abnormal auditory synchronization in stuttering: A magnetoencephalographic study.

Yoshikazu Kikuchi¹, Tsuyoshi Okamoto², Katsuya Ogata³

¹Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.

Hearing Research

|November 9, 2016

Summary

People who stutter show altered auditory cortex interactions. Enhanced right hemisphere activity and brain region communication may compensate for impaired left auditory processing.

Keywords:

Magnetoencephalography Phase-locking factors Phase-locking values Stuttering Synchronization

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Detecting Pre-Stimulus Source-Level Effects on Object Perception with Magnetoencephalography

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Area of Science:

Neuroscience
Auditory Neuroscience
Speech and Language Sciences

Background:

Previous studies indicate functional and structural changes in the auditory cortex of people who stutter (PWS).
Impaired function of the left auditory cortex is observed in PWS.

Purpose of the Study:

To investigate the interaction between the right and left auditory cortices in PWS.
To explore compensatory mechanisms in stuttering using magnetoencephalography (MEG).

Main Methods:

Reanalysis of MEG data from PWS and controls.
Evaluation of bilateral N100m latencies.
Analysis of local and inter-hemispheric phase synchronization (phase-locking factor [PLF] and phase-locking value [PLV]).

Main Results:

PWS exhibited prolonged left N100m latency compared to the right.
Enhanced alpha-band synchrony (local phase synchronization) in the right auditory cortex of PWS.
Increased beta-band synchrony (inter-hemispheric synchronization) between auditory cortices in PWS.
Positive correlation between right hemisphere synchrony and stuttering frequency.

Conclusions:

Increased right hemispheric local phase synchronization is an electrophysiological correlate of compensation in PWS.
Elevated inter-hemispheric phase synchronization between auditory cortices may also play a compensatory role.
These findings suggest a neural mechanism for managing impaired left auditory processing in stuttering.