Functional neuroanatomy of segmenting speech and nonspeech

Martha W. Burton, Steven L. Small

Research output: Contribution to journalArticle

44 Scopus citations

Abstract

This fMRI study investigates the extent to which frontal brain activation observed during speech discrimination is due to processes specific to articulatory recoding of speech or is due to segmenting and comparing portions of any continuous acoustic stimuli. A set of ten participants performed same/different judgments on the first speech sound in pairs of consonant-vowel-consonant (CVC) syllables or the first tone in pairs of sequences of three tones. Comparison between speech and tone tasks demonstrated significant bilateral temporal activation, which was associated with differences in perceptual analysis of complex acoustic stimuli. Both speech and tone tasks also showed significant activation in the left inferior frontal gyms (IFG) compared to baseline. These results suggest that portions of the left prefrontal cortex may be important for selecting and comparing auditory stimuli for decision, but may not be specifically related to speech.

Original languageEnglish (US)
Pages (from-to)644-651
Number of pages8
JournalCortex
Volume42
Issue number4
DOIs
StatePublished - May 2006
Externally publishedYes

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Keywords

  • fMRI
  • Frontal lobe
  • Speech

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Experimental and Cognitive Psychology
  • Cognitive Neuroscience

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