Article : Decoding Articulatory Features from fMRI Responses in Dorsal Speech Regions
  • 1
  • Auteurs
    J. M. Correia, B. M. B. Jansma, M. Bonte
  • Année de publication
    2015
  • Journal
    Journal of Neuroscience
  • Abstract (dans sa langue originale)

    The brain’s circuitry for perceiving and producing speech may show a notable level of overlap that is crucial for normal development and behavior. The extent to which sensorimotor integration plays a role in speech perception remains highly controversial, however. Methodological constraints related to experimental designs and analysis methods have so far prevented the disentanglement of neural responses to acoustic versus articulatory speech features. Using a passive listening paradigm and multivariate decoding of single-trial fMRI responsesto spoken syllables, weinvestigated brain-based generalization of articulatoryfeatures (place andmanner of articulation, and voicing) beyond their acoustic (surface) form in adult human listeners. For example, we trained a classifier to discriminate place of articulation within stop syllables (e.g.,/pa/ vs/ta/) andtested whetherthistraining generalizestofricatives (e.g.,/fa/ vs/sa/). This novel approach revealed generalization of place and manner of articulation at multiple cortical levels within the dorsal auditory pathway, including auditory, sensorimotor, motor, and somatosensory regions, suggesting the representation of sensorimotor information. Additionally, generalization of voicing included the right anterior superior temporal sulcus associated with the perception of human voices as well as somatosensory regions bilaterally. Ourfindings highlightthe close connection between brain systemsfor speech perception and production, and in particular, indicate the availability of articulatory codes during passive speech perception.

  • Identifiant unique
    10.1523/jneurosci.0977-15.2015
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