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Related Experiment Videos

Right hemisphere language mapping in patients with bilateral language.

Rosette A Jabbour1, Ann Hempel, John R Gates

  • 1Minnesota Epilepsy Group, PA, St. Paul, MN, USA. drrjabbour@hotmail.com

Epilepsy & Behavior : E&B
|May 24, 2005
PubMed
Summary

Electrocortical stimulation revealed language cortex in the right hemisphere of five of six patients with bilateral language. These findings suggest accessory language zones in the right hemisphere, warranting further research.

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Area of Science:

  • Neuroscience
  • Neurology
  • Neurosurgery

Background:

  • The language cortex is primarily localized to the dominant left hemisphere.
  • Language representation in the right hemisphere, especially in cases of bilateral language, is not well understood.

Purpose of the Study:

  • To investigate language representation in the right hemisphere using electrocortical stimulation (ECS).
  • To map language areas in patients with bilateral language and a right subdural electrode array (SEA).

Main Methods:

  • Retrospective review of six patients with bilateral language and right SEA implantation.
  • Language lateralization determined by preoperative intracarotid amobarbital procedure.
  • Anatomical localization verified by intraoperative photographs and MRI scans.

Related Experiment Videos

  • Identification of frontal and temporal language areas through ECS-induced errors in various language modalities.

    • Main Results:

    • Four of six patients exhibited frontal and/or temporal language areas in the right hemisphere, similar to left hemisphere essential language areas.
    • One patient showed widespread right temporal language error sites.
    • One patient had a non-responsive (silent) language map.

    Conclusions:

    • Language cortex was identified in the right hemisphere of five out of six patients diagnosed with bilateral language.
    • These right hemisphere language areas are considered accessory to the dominant left hemisphere.
    • Further studies are necessary to determine the clinical significance of these accessory language zones.