Stuttering adults' lack of pre-speech auditory modulation normalizes when speaking with delayed auditory feedback

Daliri, Ayoub; Max, Ludo

doi:10.1016/j.cortex.2017.10.019

Cited by 49 publications

(68 citation statements)

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“…As a first finding, we replicated previous results indicating that AWS show reduced speech auditory-motor learning in response to formant perturbations that are introduced suddenly inbetween two successive trials (Daliri & Max, 2018;Sengupta et al, 2016) as well as formant perturbations that are introduced gradually across multiple trials . Second, we…”

Section: Discussionsupporting

confidence: 88%

“…Additional pivotal insights may be gained from efforts investigating which specific sensory, motor, or learning mechanisms impede sensorimotor learning-and in particular auditory-motor learning-in children and adults who stutter. In our own lab, we have recently been able to demonstrate that adults who stutter show deficits in at least some aspects of the sensory prediction mechanism that drives internal model learning (Daliri & Max, 2015a;Daliri & Max, 2015b;Daliri & Max, 2018;Max & Daliri, 2019). The acuity of sensory processing itself during and after movement execution also warrants further investigation.…”

Section: Discussionmentioning

confidence: 97%

“…Consistent with this theoretical perspective, recent studies have found that adults who stutter (AWS) exhibit reduced auditory-motor adaptation as compared with adults who do not stutter (AWNS) Daliri & Max, 2018;Sengupta et al, 2016). However, it remains controversial whether such poor sensorimotor learning can be directly related to the mechanisms that are responsible for stuttering given that reported that adaptation limitations are not present in children who stutter (CWS).…”

Section: Introductionmentioning

confidence: 94%

“…We opted to have all formant frequencies shifted by the same proportional amount and in the same direction. This manipulation does not induce the perception of phonemic errors (a manipulation that we applied in Feng et al, 2011), but implements a different motor-to-sensory transformation corresponding to speech output from a vocal tract with increased or decreased geometrical dimensions (as we have also applied in Daliri & Max, 2018;Max et al, 2003;Max & Maffett, 2015). Thus, a 1 Due to a communication malfunction between the control computer and vocal effects processor, one adult and one child from the stuttering groups experienced a delay of 35 ms instead of 10 ms. As the amount of learning observed for these two participants was typical for that seen in their respective groups, we included the obtained data sets and also applied an identical 35 ms delay during the recording sessions of the two matched nonstuttering participants.…”

Section: Speech Auditory-motor Adaptation Taskmentioning

confidence: 99%

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Dissociated development of speech and limb sensorimotor learning in stuttering: speech auditory-motor learning is impaired in both children and adults who stutter

Kim

Daliri

Flanagan

et al. 2020

Preprint

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Stuttering is a neurodevelopmental disorder of speech fluency. Various experimental paradigms have demonstrated that affected individuals show limitations in sensorimotor control and learning. However, controversy exists regarding two core aspects of this perspective. First, it has been claimed that sensorimotor learning limitations are detectable only in adults who stutter (after years of coping with the disorder) but not during childhood close to the onset of stuttering. Second, it remains unclear whether stuttering individuals' sensorimotor learning limitations affect only speech movements or also unrelated effector systems involved in nonspeech movements. We report data from separate experiments investigating speech auditory-motor learning (N = 60) and limb visuomotor learning (N = 84) in both children and adults who stutter versus matched nonstuttering individuals. Both children and adults who stutter showed statistically significant limitations in speech auditory-motor adaptation with formant-shifted feedback. This limitation was more profound in children than in adults and in younger children versus older children. Between-group differences in the adaptation of reach movements performed with rotated visual feedback were subtle but statistically significant for adults. In children, even the nonstuttering groups showed limited visuomotor adaptation just like their stuttering peers. We conclude that sensorimotor learning is impaired in individuals who stutter, and that the ability for speech auditory-motor learning -- which was already adult-like in 3-6 year-old typically developing children -- is severely compromised in young children near the onset of stuttering. Thus, motor learning limitations may play an important role in the fundamental mechanisms contributing to the onset of this speech disorder.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 94%

Section: Speech Auditory-motor Adaptation Taskmentioning

confidence: 99%

See 2 more Smart Citations

Dissociated development of speech and limb sensorimotor learning in stuttering: speech auditory-motor learning is impaired in both children and adults who stutter

Kim

Daliri

Flanagan

et al. 2020

Preprint

Self Cite

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“…De relevantie van de net beschreven resultaten en onze interpretatie daarvan werd verder bevestigd in een nog recenter onderzoek (Daliri & Max, 2018). In dit nieuwe onderzoek bestudeerden we of de afwezigheid van corticale auditieve modulatie tijdens spraakbewegingsplanning in stotterende personen afhankelijk is van de auditieve feedback conditie.…”

Section: Moeilijkheden Van Sensorimotorische Integratie Bij Stotterenunclassified

Een selectief overzicht van sensorische integratieproblemen van spraak en niet-spraak bij individuen die stotteren

Max

Daliri

2018

SSTP

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SamenvattingHet begrijpen van de neurale mechanismen die ten grondslag liggen aan stotteren wordt algemeen erkend als fundamenteel voor geïnformeerde diagnose en behandeling. We geloven dat inspanningen om een dergelijk begrip te verkrijgen aanzienlijk baat kunnen hebben bij een aanpak waarbij specifieke hypotheses zijn afgeleid van een theoretisch kader dat consistent is met empirisch geijkte modellen van sensorimotorische controle en neuraal functioneren. Hier bespreken we selectief eerder en recent stotteronderzoek van zowel andere laboratoria als ons eigen laboratorium omtrent huidige theoretische inzichten in de neurale controle van beweging. Hoewel geenszins een uitgebreide literatuurstudie, bespreekt dit werk studies die aantonen dat (a) de vloeiende spraak en reactietijden van volwassenen die stotteren over het algemeen langzamer zijn dan die van volwassenen die niet stotteren, maar zulke verschillen zouden strategieën kunnen reflecteren om te compenseren voor meer fundamentele sensorimotorische problemen, (b) sensorimotorische problemen bij stotterende individuen zijn niet beperkt tot het spraakproductiesysteem maar strekken zich uit over effector-systemen, (c) ingevolge zijn zowel spraak-en niet-spraak sensorimotorisch leren gelimiteerd in individuen die stotteren, en (d) fundamentele stoornissen in sensorimotorische integratie een hoofdonderdeel kunnen zijn in al deze observaties, gezien het feit dat individuen die stotteren een atypische modulatie van sensorische verwerking laten zien zelfs voorafgaand aan bewegingsaanvang. SummaryUnderstanding the neural mechanisms underlying stuttering is widely acknowledged as fundamental to informed diagnosis and treatment. We believe that efforts to achieve Correspondentieadres: Ludo

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Perceptual manifestations of auditory modulation during speech planning

2018

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Recent studies have provided electrophysiological evidence that the auditory system's response to externally generated auditory stimuli during speech planning is modulated in comparison to its responses to identical stimuli during no-speaking control conditions. In this study, we examined whether such neural modulations during speech planning result in measurable perceptual modulations. In a two-interval forced choice intensity discrimination paradigm, participants were asked to judge the intensity of a standard tone (with constant intensity), played during a fixation period, relative to the intensity of a comparison tone (with varying intensity), played during speech planning or during no-speaking conditions (silent reading and passive listening). Psychometric functions were fitted to participants' responses in each condition; psychometric functions were used to calculate the point of subjective equality (as a measure of perceptual threshold) and the slope of the psychometric functions (as a measure of perceptual uncertainty). We found that the point of subjective equality in the speaking condition was statistically significantly larger than that in the no-speaking conditions. In addition, slope values in the speaking and listening conditions were statistically significantly smaller than slope value in the silent reading condition. Together, these results suggest that previously reported electrophysiological modulations of the auditory system during speech planning may have perceptual manifestations, such as increases in perceptual thresholds and uncertainty of perceptual thresholds in an intensity discrimination task.

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Stuttering adults' lack of pre-speech auditory modulation normalizes when speaking with delayed auditory feedback

Cited by 49 publications

References 45 publications

Dissociated development of speech and limb sensorimotor learning in stuttering: speech auditory-motor learning is impaired in both children and adults who stutter

Dissociated development of speech and limb sensorimotor learning in stuttering: speech auditory-motor learning is impaired in both children and adults who stutter

Een selectief overzicht van sensorische integratieproblemen van spraak en niet-spraak bij individuen die stotteren

Perceptual manifestations of auditory modulation during speech planning

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