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Example of Narrative Recall produced by a child with DLD ...
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Example of Narrative Recall produced by a child with DLD ...
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Speech movement variability in people who stutter (Wiltshire et al., 2021) ...
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Speech movement variability in people who stutter (Wiltshire et al., 2021) ...
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Cerebral lateralisation of first and second languages in bilinguals assessed using functional transcranial Doppler ultrasound
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Functional organisation for verb generation in children with developmental language disorder
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In: Neuroimage (2021)
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Asymmetry of Auditory-Motor Speech Processing is Determined by Language Experience
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In: J Neurosci (2021)
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Abstract:
Speech processing relies on interactions between auditory and motor systems and is asymmetrically organized in the human brain. The left auditory system is specialized for processing of phonemes, whereas the right is specialized for processing of pitch changes in speech affecting prosody. In speakers of tonal languages, however, processing of pitch (i.e., tone) changes that alter word meaning is left-lateralized indicating that linguistic function and language experience shape speech processing asymmetries. Here, we investigated the asymmetry of motor contributions to auditory speech processing in male and female speakers of tonal and non-tonal languages. We temporarily disrupted the right or left speech motor cortex using transcranial magnetic stimulation (TMS) and measured the impact of these disruptions on auditory discrimination (mismatch negativity; MMN) responses to phoneme and tone changes in sequences of syllables using electroencephalography (EEG). We found that the effect of motor disruptions on processing of tone changes differed between language groups: disruption of the right speech motor cortex suppressed responses to tone changes in non-tonal language speakers, whereas disruption of the left speech motor cortex suppressed responses to tone changes in tonal language speakers. In non-tonal language speakers, the effects of disruption of left speech motor cortex on responses to tone changes were inconclusive. For phoneme changes, disruption of left but not right speech motor cortex suppressed responses in both language groups. We conclude that the contributions of the right and left speech motor cortex to auditory speech processing are determined by the functional roles of acoustic cues in the listener's native language. SIGNIFICANCE STATEMENT The principles underlying hemispheric asymmetries of auditory speech processing remain debated. The asymmetry of processing of speech sounds is affected by low-level acoustic cues, but also by their linguistic function. By combining transcranial magnetic stimulation (TMS) and electroencephalography (EEG), we investigated the asymmetry of motor contributions to auditory speech processing in tonal and non-tonal language speakers. We provide causal evidence that the functional role of the acoustic cues in the listener's native language affects the asymmetry of motor influences on auditory speech discrimination ability [indexed by mismatch negativity (MMN) responses]. Lateralized top-down motor influences can affect asymmetry of speech processing in the auditory system.
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Keyword:
Research Articles
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URL: http://www.ncbi.nlm.nih.gov/pubmed/33298537 https://doi.org/10.1523/JNEUROSCI.1977-20.2020 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7880293/
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Cerebral lateralisation of first and second languages in bilinguals assessed using functional transcranial Doppler ultrasound
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In: Wellcome Open Res (2021)
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Disruption of speech motor adaptation with repetitive transcranial magnetic stimulation of the articulatory representation in primary motor cortex
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In: Cortex (2021)
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Functional organisation for verb generation in children with developmental language disorder
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Failure of tDCS to modulate motor excitability and speech motor learning
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In: Neuropsychologia (2020)
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Mapping Human Laryngeal Motor Cortex during Vocalization
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In: Cereb Cortex (2020)
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Morphological and functional variability in central and subcentral motor cortex of the human brain
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In: Brain Struct Funct (2020)
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Data from: The influence of evaluative right/wrong feedback on phonological and semantic processes in word learning ...
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Stage2_Appendix from The influence of evaluative right/wrong feedback on phonological and semantic processes in word learning. ...
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Supplementary material from "The influence of evaluative right/wrong feedback on phonological and semantic processes in word learning" ...
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Supplementary material from "The influence of evaluative right/wrong feedback on phonological and semantic processes in word learning" ...
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Stage2_Appendix from The influence of evaluative right/wrong feedback on phonological and semantic processes in word learning. ...
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Stage2_Appendix from The influence of evaluative right/wrong feedback on phonological and semantic processes in word learning ...
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Supplementary material from "The influence of evaluative right/wrong feedback on phonological and semantic processes in word learning" ...
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