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Related Experiment Videos

Neural correlates for numerical processing in the manual mode.

Nobuo Masataka1, Takashi Ohnishi, Etsuko Imabayashi

  • 1Primate Research Institute, Kyoto University, Inuyama, Aichi 484-8506, Japan. masataka@pri.kyoto-u.ac.jp

Journal of Deaf Studies and Deaf Education
|December 2, 2005
PubMed
Summary

This study shows that the brain activates similar regions for understanding numerical signs in American Sign Language (ASL) and Japanese Sign Language (JSL), regardless of language background. This suggests a non-linguistic basis for numerical processing in the brain.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Linguistics

Background:

  • Understanding numerical processing in sign language is crucial for cognitive neuroscience.
  • Deaf signers may exhibit unique neural pathways for numerical cognition.

Purpose of the Study:

  • To investigate the neural basis of comprehending American Sign Language (ASL) numeral signs.
  • To examine if first language (Japanese Sign Language - JSL) influences ASL numeral comprehension.
  • To identify brain regions involved in processing numerical information in deaf signers.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to scan participants.
  • Participants were deaf signers with Japanese Sign Language as their first language.
  • fMRI data was collected twice during the experiment.

Related Experiment Videos

Main Results:

  • A network of brain areas was immediately activated upon learning the numeric meaning of ASL signs.
  • Many activated areas are known to be involved in numerical processing.
  • Similar neural networks were observed regardless of the linguistic mode.

Conclusions:

  • Numerical processing in the brain appears to have a non-linguistic foundation.
  • The brain utilizes a consistent neural network for numerical cognition across different languages and modalities.
  • This finding has implications for understanding numerical cognition in deaf populations.