The Cortical Organization of Speech Processing

Nat Rev Neurosci. 2007 May;8(5):393-402. doi: 10.1038/nrn2113. Epub 2007 Apr 13.

Abstract

Despite decades of research, the functional neuroanatomy of speech processing has been difficult to characterize. A major impediment to progress may have been the failure to consider task effects when mapping speech-related processing systems. We outline a dual-stream model of speech processing that remedies this situation. In this model, a ventral stream processes speech signals for comprehension, and a dorsal stream maps acoustic speech signals to frontal lobe articulatory networks. The model assumes that the ventral stream is largely bilaterally organized--although there are important computational differences between the left- and right-hemisphere systems--and that the dorsal stream is strongly left-hemisphere dominant.

Publication types

  • Research Support, N.I.H., Extramural
  • Review

MeSH terms

  • Brain Mapping*
  • Cerebral Cortex / physiology*
  • Humans
  • Models, Psychological
  • Speech / physiology*
  • Verbal Behavior / physiology*