Modulation of auditory processing during speech movement planning is limited in adults who stutter

Ayoub Daliri, Ludo Max

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

Stuttering is associated with atypical structural and functional connectivity in sensorimotor brain areas, in particular premotor, motor, and auditory regions. It remains unknown, however, which specific mechanisms of speech planning and execution are affected by these neurological abnormalities. To investigate pre-movement sensory modulation, we recorded 12 stuttering and 12 nonstuttering adults' auditory evoked potentials in response to probe tones presented prior to speech onset in a delayed-response speaking condition vs. no-speaking control conditions (silent reading; seeing nonlinguistic symbols). Findings indicate that, during speech movement planning, the nonstuttering group showed a statistically significant modulation of auditory processing (reduced N1 amplitude) that was not observed in the stuttering group. Thus, the obtained results provide electrophysiological evidence in support of the hypothesis that stuttering is associated with deficiencies in modulating the cortical auditory system during speech movement planning. This specific sensorimotor integration deficiency may contribute to inefficient feedback monitoring and, consequently, speech dysfluencies.

Original languageEnglish (US)
Pages (from-to)59-68
Number of pages10
JournalBrain and Language
Volume143
DOIs
StatePublished - Apr 1 2015
Externally publishedYes

Keywords

  • Auditory cortex
  • Movement planning
  • Sensorimotor integration
  • Speech
  • Stuttering

ASJC Scopus subject areas

  • Language and Linguistics
  • Experimental and Cognitive Psychology
  • Linguistics and Language
  • Cognitive Neuroscience
  • Speech and Hearing

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