Hemispheric Specialization and Interhemispheric Integration: Insights from Experiments with Commissurotomy Patients

  • M. J. Tramo
  • K. Baynes
  • R. Fendrich
  • G. R. Mangun
  • E. A. Phelps
  • P. A. Reuter-Lorenz
  • M. S. Gazzaniga
Part of the Advances in Behavioral Biology book series (ABBI, volume 45)


During the decade following the first edition of this book, methodological advances in a number of related disciplines have greatly enriched our fund of knowledge concerning the role of the corpus callosum in higher brain functions. At the microanatomical level, new tracer techniques have provided a detailed picture of interhemispheric connectivity patterns among functionally specialized cortical areas in anthropoids (for review see Pandya and Seltzer 1986). At the gross anatomical level, magnetic resonance imaging (MRI) has provided multiplanar, high-resolution images of the living human brain by which to: 1) analyze callosal morphometry; 2) delineate precisely the extent of transection in commissurotomy patients; and 3) correlate in vivo the extent of transection with functional effects (e.g., Gazzaniga et al. 1985, 1989; Oppenheim et al. 1989). At the behavioral level, the facility with which microcomputers can be used to generate stimuli, manipulate specific stimulus features, monitor a variety of response modes, and measure response latencies has enhanced the fine-grained assessment of cognitive, perceptual, and motor functions in neurological patients. Meanwhile, increasing numbers of collaborations among cognitive psychologists and clinical neuroscientists have provided the impetus to combine these methods in pursuit of brain-behavior correlations.


Corpus Callosum Left Hemisphere Left Visual Field Word Length Effect Hemispheric Specialization 
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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • M. J. Tramo
    • 1
  • K. Baynes
    • 2
  • R. Fendrich
    • 2
  • G. R. Mangun
    • 2
  • E. A. Phelps
    • 3
  • P. A. Reuter-Lorenz
    • 4
  • M. S. Gazzaniga
    • 2
  1. 1.Department of Neurobiology, Harvard Medical School; Neurology ServiceMassachusetts General HospitalUSA
  2. 2.Center for NeuroscienceUniversity of California at DavisUSA
  3. 3.Department of PsychologyYale UniversityUSA
  4. 4.Department of PsychologyUniversity of MichiganUSA

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