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Right-hemispheric language evidence from cortical stimulation.

O J Andy, S C Bhatnagar

    Brain and Language
    |September 1, 1984
    PubMed
    Summary
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    The right hemisphere can process language, especially in left-dominant individuals. Electrical stimulation revealed measurable language responses in the right hemisphere during epilepsy surgery.

    Area of Science:

    • Neuroscience
    • Neurolinguistics
    • Neurosurgery

    Background:

    • The left hemisphere is typically dominant for language processing in most individuals.
    • Clinical evidence suggests the right hemisphere possesses latent language capabilities.
    • These capabilities can become measurable under specific neuroanatomical conditions.

    Purpose of the Study:

    • To investigate the functional capacity of the right hemisphere for language.
    • To measure evoked language responses during direct electrical stimulation of the right hemisphere.
    • To explore right-hemispheric language function in patients with left-hemispheric language dominance.

    Main Methods:

    • Electrical brain stimulation was applied to the right hemisphere.
    • Evoked language responses were recorded in three patients.

    Related Experiment Videos

  • Patients were undergoing temporal lobe resections for intractable epilepsy.
  • All patients exhibited left-hemispheric language dominance.

    • Main Results:

    • Measurable language processing was observed in the right hemisphere.
    • Electrical stimulation elicited specific language-related responses.
    • The findings demonstrate functional language capacity in the non-dominant hemisphere.

    Conclusions:

    • The right hemisphere exhibits a functional capacity for language, particularly in left-dominant individuals.
    • Direct electrical stimulation can reveal and measure this right-hemispheric language function.
    • This has implications for understanding brain plasticity and language organization.