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Hemispheric specialization for sign language

G Grossi1, C Semenza, S Corazza

  • 1Istituto di Psicologia, Universitá di Pavia, Italy.

Neuropsychologia
|July 1, 1996
PubMed
Summary
This summary is machine-generated.

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Sign language processing shows left hemisphere superiority, similar to spoken language. Deaf individuals process sign language handshapes faster in the right visual field, indicating left-brain dominance.

Area of Science:

  • Neuroscience
  • Linguistics
  • Cognitive Psychology

Background:

  • Sign language lateralization studies yield inconclusive results regarding hemispheric roles.
  • Clinical reports indicate sign language impairment solely after left hemisphere damage, suggesting parallels with spoken language organization.

Purpose of the Study:

  • To investigate hemispheric involvement in sign language processing.
  • To determine if sign language exhibits lateralization patterns similar to spoken languages.

Main Methods:

  • A tachistoscopic study was employed to present visual stimuli.
  • Deaf subjects participated in the experiment, matching sign language handshapes based on semantic equivalence.

Main Results:

Related Experiment Videos

  • Sign language handshape matching based on meaning was processed faster in the right visual field.
  • This faster processing in the right visual field indicates a left hemisphere advantage.

    • Conclusions:

    • The findings support left hemisphere superiority in sign language processing.
    • Sign language exhibits a neural organization comparable to spoken languages, with the left hemisphere playing a dominant role.