Functional connectivity changes in adults with developmental stuttering: a preliminary study using quantitative electro-encephalography

Joos, Kathleen; Ridder, Dirk De; Boey, Ronny A.; Vanneste, Sven

doi:10.3389/fnhum.2014.00783

Cited by 37 publications

(39 citation statements)

References 60 publications

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“…In the current study, this time window included the baseline and the event-related changes in each testing condition. Joos et al (2014) reported similar group differences in β power averaged across all electrodes for resting state conditions. Taken together, these findings suggest that reduced β spectral amplitude, especially when arising from sensorimotor regions, might be a stable marker of stuttering.…”

Section: Discussionmentioning

confidence: 62%

EEG Mu ( µ ) rhythm spectra and oscillatory activity differentiate stuttering from non-stuttering adults

et al. 2017

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Stuttering is linked to sensorimotor deficits related to internal modeling mechanisms. This study compared spectral power and oscillatory activity of EEG mu (μ) rhythms between persons who stutter (PWS) and controls in listening and auditory discrimination tasks. EEG data were analyzed from passive listening in noise and accurate (same/different) discrimination of tones or syllables in quiet and noisy backgrounds. Independent component analysis identified left and/or right μ rhythms with characteristic alpha (α) and beta (β) peaks localized to premotor/motor regions in 23 of 27 people who stutter (PWS) and 24 of 27 controls. PWS produced μ spectra with reduced β amplitudes across conditions, suggesting reduced forward modeling capacity. Group time-frequency differences were associated with noisy conditions only. PWS showed increased μ-β desynchronization when listening to noise and early in discrimination events, suggesting evidence of heightened motor activity that might be related to forward modeling deficits. PWS also showed reduced μ-α synchronization in discrimination conditions, indicating reduced sensory gating. Together these findings indicate spectral and oscillatory analyses of μ rhythms are sensitive to stuttering. More specifically, these analyses can reveal stuttering-related sensorimotor processing differences in passive listening and auditory discrimination tasks which may be influenced by basal ganglia deficits.

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Section: Discussionmentioning

confidence: 62%

EEG Mu ( µ ) rhythm spectra and oscillatory activity differentiate stuttering from non-stuttering adults

et al. 2017

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“…Differences in the nervous system areas related to the auditorymotor circuit were found in persons with stuttering, and these differences may impair the speech fluency planning and execution 12,15 . Thus, this study analyzed the effect of delayed auditory feedback in adults with stuttering in the frequency of disfluencies and speech rate in spontaneous speech and reading of text, and compared it with fluent adults, through a specific software.…”

Section: Discussionmentioning

confidence: 99%

“…Many studies [12][13][14][15][16] with neuroimaging performed in persons who stutter have shown relevant results on the auditory regions and their connections with other brain areas in the speech production. The presence of a generalized motor sensorial temporal deficit due to the communication impairment between the brain areas related to the speech of stutters was described 12 .…”

Section: Introductionmentioning

confidence: 99%

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The role of auditory temporal cues in the fluency of stuttering adults

et al. 2017

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Purpose: to compare the frequency of disfluencies and speech rate in spontaneous speech and reading in adults with and without stuttering in non-altered and delayed auditory feedback (NAF, DAF).Methods: participants were 30 adults: 15 with Stuttering (Research Group -RG), and 15 without stuttering (Control Group -CG). The procedures were: audiological assessment and speech fluency evaluation in two listening conditions, normal and delayed auditory feedback (100 milliseconds delayed by Fono Tools software).Results: the DAF caused a significant improvement in the fluency of spontaneous speech in RG when compared to speech under NAF. The effect of DAF was different in CG, because it increased the common disfluencies and the total of disfluencies in spontaneous speech and reading, besides showing an increase in the frequency of stuttering--like disfluencies in reading. The intergroup analysis showed significant differences in the two speech tasks for the two listening conditions in the frequency of stuttering-like disfluencies and in the total of disfluencies, and in the flows of syllable and word-per--minute in the NAF.Conclusion: the results demonstrated that delayed auditory feedback promoted fluency in spontaneous speech of adults who stutter, without interfering in the speech rate. In non-stuttering adults an increase occurred in the number of common disfluencies and total of disfluencies as well as reduction of speech rate in spontaneous speech and reading.

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“…In this sense, some researchers believe that stuttering is defined as speech characterized by verbal dysfluencies, but should not be seen as an isolated speech disorder, but as a generalized sensorimotor timing deficit due to impaired communication between speech related brain areas 8 . One of the neurological characteristics of developmental stuttering is the abnormal motor preparation of speech 9 .…”

Section: Introductionmentioning

confidence: 99%

Prolongamentos na fala de adultos com e sem gagueira

et al. 2016

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Purpose: to carry out a quantitative and qualitative analysis of the prolongations of adults who stutter and who not stutter. Methods: participants were divided into two groups: Research Group (RG, 15 adults who stutter) and Control Group (GC, 15 fluent adults). Procedures were: fluency assessment, Stuttering Severity Instrument and quantitative and qualitative analyzes of the prolongations.Results: there was a greater number of non hesitative prolongations in RG, whereas CG showed more hesitative prolongations in relation to the total of disfluencies. Non hesitative prolongations occurred more frequently in the initial and monosyllabic words, and in the medial position of the sentence in RG.Regarding the muscular tension and duration, a difference was observed for the muscular tension in the non hesitative prolongations, with higher mean value for RG. Conclusion: non hesitative prolongations occurred more frequently in RG, in initial words, monosyllables, and medial position of the sentence. Qualitatively, the muscular tension was a typical characteristic of non hesitative prolongations in RG. No differences were found for hesitative prolongations between the groups in relation to the frequency of the total of speech, the position of prolongations in the words and in the sentences, and for the qualitative characteristics, regarding to muscular tension and duration. Keywords: Speech Language and Hearing Sciences; Speech; Stuttering; Speech Disorders; Evaluation; Adult RESUMO Objetivo: realizar uma análise quantitativa e qualitativa dos prolongamentos de adultos com e sem gagueira. Métodos: os participantes foram divididos em: Grupo de Pesquisa (GP, 15 adultos com gagueira) e Grupo Controle (GC, 15 fluentes). Os procedimentos utilizados foram: avaliação da fluência, Instrumento de Gravidade da Gagueira e análises quantitativa e qualitativa dos prolongamentos. Resultados: GP mostrou maior número de prolongamentos não hesitativos, enquanto que GC mostrou maior ocorrência de prolongamentos hesitativos em relação ao total das disfluências. Prolongamentos não hesitativos ocorreram com maior frequência na palavra inicial e monossilábica, bem como na posição medial da frase para GP. Em relação à tensão muscular e duração, observou-se diferença apenas para a tensão muscular nos prolongamentos não hesitativos com maior média de ocorrência para GP. Conclusão: os prolongamentos não hesitativos ocorreram com maior frequência no GP, nas palavras iniciais, monossílabos e na posição medial da frase. Qualitativamente a tensão muscular foi uma característica típica dos prolongamentos não hesitativos no GP. Com relação aos prolongamentos hesitativos houve semelhança entre os adultos dos dois grupos quanto à frequência em relação ao total da fala, a posição dos prolongamentos nas palavras e nas frases e nos aspectos qualitativos, relacionados a tensão muscular e duração.

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Functional connectivity changes in adults with developmental stuttering: a preliminary study using quantitative electro-encephalography

Cited by 37 publications

References 60 publications

EEG Mu ( µ ) rhythm spectra and oscillatory activity differentiate stuttering from non-stuttering adults

EEG Mu ( µ ) rhythm spectra and oscillatory activity differentiate stuttering from non-stuttering adults

The role of auditory temporal cues in the fluency of stuttering adults

Prolongamentos na fala de adultos com e sem gagueira

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