Collaboration between the hemispheres of a callosotomy patient. Emerging right hemisphere speech and the left hemisphere interpreter

Michael S. Gazzaniga, James C. Eliassen, Laura Nisenson, C. Mark Wessinger, Robert Fendrich, Kathleen Baynes

Research output: Contribution to journalArticle

36 Scopus citations

Abstract

Split brain patients who are initially unable to produce speech in their right hemispheres sometimes develop the ability to do so. Patient J.W., the subject of this report is such a patient. At the time of his callosotomy, J.W. had a language dominant left hemisphere; his right hemisphere could understand both spoken and written language, but he was unable to speak. Fourteen years after his surgery we found that J.W. was capable of naming ~25% of the stimuli presented to his left visual field (LVF). Now, 1 year later, we find that he can name about 60% of such stimuli. This late-developing speech ability appears to be the consequence of long-term neural plasticity. However, the subject's extended verbal responses to LVF stimuli seem to result from a collaboration between the hemispheres and to involve the left hemisphere interpreter.

Original languageEnglish (US)
Pages (from-to)1255-1262
Number of pages8
JournalBrain
Volume119
Issue number4
StatePublished - Aug 1996

Keywords

  • Interpreter
  • Right hemisphere speech
  • Split brain

ASJC Scopus subject areas

  • Medicine(all)
  • Arts and Humanities (miscellaneous)
  • Clinical Neurology

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    Gazzaniga, M. S., Eliassen, J. C., Nisenson, L., Wessinger, C. M., Fendrich, R., & Baynes, K. (1996). Collaboration between the hemispheres of a callosotomy patient. Emerging right hemisphere speech and the left hemisphere interpreter. Brain, 119(4), 1255-1262.