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Bilateral brain processes for comprehending natural language.

Mark Jung-Beeman1

  • 1Department of Psychology, and Cognitive Brain Mapping Group, Northwestern University, 2029 Sheridan Road, Evanston, IL 60208-2710, USA. mjungbee@northwestern.edu

Trends in Cognitive Sciences
|October 11, 2005
PubMed
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Natural language comprehension is complex for neuroscientists, presenting a paradox. While the left hemisphere (LH) typically dominates language, the right hemisphere (RH) may be crucial for understanding complex language.

Area of Science:

  • Cognitive Neuroscience
  • Neurobiology
  • Psycholinguistics

Background:

  • The left hemisphere (LH) is traditionally associated with language processing.
  • However, complex natural language comprehension may involve significant right hemisphere (RH) contributions.
  • Understanding hemispheric roles in cognition is key to neuroscience.

Purpose of the Study:

  • To investigate the role of the right hemisphere (RH) in complex natural language comprehension.
  • To explore the neural basis of semantic processing and hemispheric asymmetry.
  • To reconcile the LH dominance in language with RH involvement in complex comprehension.

Main Methods:

  • Review of evidence from neuropsychology, neuroimaging, and neuroanatomy.
  • Analysis of semantic processing components and their hemispheric distribution.

Related Experiment Videos

  • Examination of brain asymmetry in cognitive functions.

    • Main Results:

    • Semantic processing involves at least three interacting, separable components.
    • These components have bilateral neural substrates.
    • The RH contributes coarser semantic computations compared to the LH.

    Conclusions:

    • The right hemisphere (RH) plays a critical role in comprehending complex natural language.
    • Hemispheric asymmetry in brain function offers insights into complex cognition.
    • A nuanced view of language processing acknowledges bilateral contributions.