Advertisement

A Remaining Problem in Hemialexia

Tachistoscopic Hemineglect and Hemialexia
  • Morihiro Sugishita
  • Akira Shinohara
  • Takeyoshi Shimoji
  • Tetsuro Ogawa

Abstract

Hemialexia is defined in the narrow sense as an inability produced by a cerebral lesion in comprehension of written words presented in one of the two visual hemifields (Benson and Geschwind, 1969). However, in some patients diagnosed as hemialexic [e.g., Trescher and Ford’s (1937) case and Maspes’ (1948) cases] it is difficult to identify whether their disturbances are in comprehension (i.e., word-to-picture matching) or in reading aloud. Thus, hemialexia may be classified into two categories: type I hemialexia, an inability to comprehend written words, and type II hemialexia, an inability to read aloud written words or letters.

Keywords

Visual Acuity Corpus Callosum Reading Comprehension Picture Naming Central Fixation Point 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Benson, D. F. and Geschwind, N., 1969, The alexias, in: Handbook of Clinical Neurology (P. J. Vinken and G. W. Bruyn, eds.), North-Holland, Amsterdam, Vol. 4, pp. 112–140.Google Scholar
  2. Damasio, A. R., Chui, H. C., Corbett, J., and Kassel, N., 1980, Posterior callosal section in a non- epileptic patients, J. Neurol. Neurosurg. Psychiatry 43: 351–356.CrossRefGoogle Scholar
  3. Gazzaniga, M. S., and Freedman, H., 1973, Observations on visual processes after postrior callosal section, Neurology 23: 1126–1130.PubMedGoogle Scholar
  4. Gazzaniga, M. S., and Sperry, R. W., 1967, Language after posterior callosal section, Brain 90: 131–148.PubMedCrossRefGoogle Scholar
  5. Gazzaniga, M. S., Bogen, J. E., and Sperry, R. W., 1962, Some functional effects of sectioning the cerebral commissures in man, Proc. Natl. Acad. Sci. USA 48: 1765–1769.PubMedCrossRefGoogle Scholar
  6. Gazzaniga, M. S., Bogen, J. E., and Sperry, R. W., 1965, Observations of visual perception after disconnexion of the cerebral hemispheres in man, Brain 88: 221–236.PubMedCrossRefGoogle Scholar
  7. Greenblatt, S. H., Saunders, R. L., Culver, C. M., and Bogdanowich, W., 1980, Normal inter- hemispheric visual transfer with incomplete section, Arch. Neurol. 37: 567–571.PubMedGoogle Scholar
  8. Inouye, T., 1956, Picture test chart in accordance with the internation standard, Ophthalmologica 131: 121–128.PubMedCrossRefGoogle Scholar
  9. Iwata, M., Sugishita, M., and Toyokura, Y., 1973, Visual-speech disconnexion syndrome of the right visual cortex after the transection of the splenium of the corpus callosum, Clin. Neurol. 13: 308–316.Google Scholar
  10. Iwata, M., Sugishita, M., Toyokura, Y., Yamada, R., and Yoshioka, M., 1974, Etude sur le syndrome de disconnexion visuo-linguale après la transection du splénium du corpus calleux, J. Neurol. Sci. 23: 421–432.PubMedCrossRefGoogle Scholar
  11. Levine, D. N., and Calvanio, R., 1980, Visual discrimination after lesion of the posterior corpus callosum, Neurology 30: 21–30.PubMedGoogle Scholar
  12. Maspes, P. E., 1948, Le syndrome expérimental chez l’homme de la section du splénium du corps calleux alexie visuelle pure hemianopsique, Rev. Neurol. 80: 100–113.Google Scholar
  13. McKeever, W. F., Larrabee, G. J., Sullivan, K. F., Johnson, H. J., Ferguson, S. M., and Rayport, M., 1981, Unimanual tactile anomia consequent to corpus callosum: Reduction of deficit under hypnosis, Neuropsychologia 19: 179–190.PubMedCrossRefGoogle Scholar
  14. Nebes, R., 1973, Perception of spatial relationships by the right and left hemispheres of com- missurotomized man, Neuropsychologia 11: 285–289.PubMedCrossRefGoogle Scholar
  15. Risse, G., Ledoux, J., Soringer, S. P., and Gazzaniga, M. S., 1978, The anterior commissure in man: Functional variation in a multisensory system, Neuropsychologia 16: 23–31.PubMedCrossRefGoogle Scholar
  16. Sidtis, J. J., Volpe, B. T., Holtzman, J. D., Wilson, D. H., and Gazzaniga, M. S., 1981, Cognitive interaction after staged callosal section: Evidence for transfer of semantic activation, Science 212: 344–346.PubMedCrossRefGoogle Scholar
  17. Sugishita, M., Iwata, M., Toyokura, Y., Yoshioka, M., and Yamada, R., 1978, Reading of ideograms and phonograms in Japanese patients after partial commissurotomy, Neuropsychologia 16: 959–973.Google Scholar
  18. Teng, E. L., and Sperry, R. W., 1973, Interhemispheric interaction during simultaneous bilateral presentation of letters or digits in commissurotomized patients, Neuropsychologia 11: 131–140.PubMedCrossRefGoogle Scholar
  19. Trescher, J. H., and Ford, F. R., 1937, Colloid cyst of the third ventricle, Arch. Neurol. Psychiat. 37: 959–973.Google Scholar
  20. Watanabe, S., Hojo, K., Sato, T., Sakurada, T., Tanaka, T., and Shimoyama, M., 1979, Neuropsychological studies of two subjects after the transection of the splenium of the corpus callosum, No to Shinkei 31: 837–842.PubMedGoogle Scholar
  21. Wechsler, A. F., 1972, Transient left hemialexia, Neurology 22: 628–633.PubMedGoogle Scholar
  22. Zaidel, E., 1978, Lexical organization in the right hemisphere, in: Cerebral Correlates of Conscious Experience ( P. A. Buser and A. Rougel-Buser, eds.), Elsevier/North-Holland, Amsterdam, pp. 177–197.Google Scholar

Copyright information

© Plenum Press, New York 1985

Authors and Affiliations

  • Morihiro Sugishita
    • 1
  • Akira Shinohara
    • 2
  • Takeyoshi Shimoji
    • 2
  • Tetsuro Ogawa
    • 3
  1. 1.Department of Clinical NeurologyTokyo Metropolitan Institute for NeurosciencesTokyoJapan
  2. 2.Department of NeurosurgeryJuntendo UniversityTokyoJapan
  3. 3.Department of OpthalmologyTokyo Medical CollegeTokyoJapan

Personalised recommendations