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Speech motor facilitation is not affected by ageing but is modulated by task demands during speech perception
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Visual cues in adaptation to noise-vocoded speech (Trotter et al., 2021) ...
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Visual cues in adaptation to noise-vocoded speech (Trotter et al., 2021) ...
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The causal role of left and right superior temporal gyri in speech perception in noise:A Transcranial Magnetic Stimulation Study
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Effects of stimulus response compatibility on covert imitation of vowels
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Modulation of intra- and inter-hemispheric connectivity between primary and premotor cortex during speech perception
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Effects of stimulus response compatibility on covert imitation of vowels
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Transcranial magnetic stimulation and motor evoked potentials in speech perception research
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The role of hearing ability and speech distortion in the facilitation of articulatory motor cortex
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Vocal Tract Images Reveal Neural Representations of Sensorimotor Transformation During Speech Imitation
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Abstract:
Imitating speech necessitates the transformation from sensory targets to vocal tract motor output, yet little is known about the representational basis of this process in the human brain. Here, we address this question by using real-time MR imaging (rtMRI) of the vocal tract and functional MRI (fMRI) of the brain in a speech imitation paradigm. Participants trained on imitating a native vowel and a similar nonnative vowel that required lip rounding. Later, participants imitated these vowels and an untrained vowel pair during separate fMRI and rtMRI runs. Univariate fMRI analyses revealed that regions including left inferior frontal gyrus were more active during sensorimotor transformation (ST) and production of nonnative vowels, compared with native vowels; further, ST for nonnative vowels activated somatomotor cortex bilaterally, compared with ST of native vowels. Using test representational similarity analysis (RSA) models constructed from participants’ vocal tract images and from stimulus formant distances, we found that RSA searchlight analyses of fMRI data showed either type of model could be represented in somatomotor, temporal, cerebellar, and hippocampal neural activation patterns during ST. We thus provide the first evidence of widespread and robust cortical and subcortical neural representation of vocal tract and/or formant parameters, during prearticulatory ST.
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Keyword:
Original Articles
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URL: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5939209/ https://doi.org/10.1093/cercor/bhx056 http://www.ncbi.nlm.nih.gov/pubmed/28334401
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The effect of speech distortion on the excitability of articulatory motor cortex
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Does musical enrichment enhance the neural coding of syllables?:neuroscientific interventions and the importance of behavioral data
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Does musical enrichment enhance the neural coding of syllables? Neuroscientific interventions and the importance of behavioral data
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The role of accent imitation in sensorimotor integration during processing of intelligible speech
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The role of accent imitation in sensorimotor integration during processing of intelligible speech
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On-line plasticity in spoken sentence comprehension: Adapting to time-compressed speech
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