The Clinical Course of Prosopagnosia.

DOI 2 Citations 39 References
  • Koyama Yoshiko
    School of Health Sciences Faculty of Medicine Kanazawa University Department of Neuropsychiatry, Kanazawa University School of Medicine
  • Torii Housaku
    Department of Neuropsychiatry, Kanazawa Medical University
  • Imai Masao
    Department of Neuropsychiatry, Kanazawa Medical University
  • Tamai Akira
    Tsurugaonsen Hospital

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Other Title
  • 相貌失認の長期経過

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    Recently, prosopagnosia, inability to recognize visually familiar faces, has been discussed on its heterogeneity based upon some differences in clinical symptoms, mechanisms, and lesions among reported cases. De Renzi et al (1991), Damasio et al (1990), and Benton and Tranel (1993) classified prosopagnosia into apperceptive, associative, and amnesic-associative types. The course of prosopagnosia should be considered to be related closely to these differences.<br>    We presented three prosopagnosia patients. The case I showed associative prosopagnosia following bilateral occipito-temporal infarctions. The two other cases showed apperceptive prosopagnosia. Prosopagnosia in the case II was caused by bilateral occipital hemorrhagic infarctions, and the case III had prosopagnosia due to infarction confined to the territory of the right posterior cerebral artery.<br>    We investigated the course of prosopagnosia in our patients and cases reported in the literature.<br>    The data suggested as follows :<br>    1 ) Prosopagnosia associated with bilateral damage of inferior mesial occipito-temporal regions supplied by the PCA is generally severe and persistent.<br>    2 ) Unilateral damage confined to the right hemisphere also may produce prosopagnosia. In cases with lasting prosopagnosia after unilateral damage it was found that the lesion was extended mesially in the right inferior mesial occipital region (area 18 and 19) and invaded inferior longitudinal fasciculus and the splenium of the corpus callosum. Alternatively, prosopagnosia resulted from the smaller lesion of the above regions, e. g. the damage located more laterally in inferior component of area 18 and 19, should be mild and recover within a year.

Journal

  • Higher Brain Function Research

    Higher Brain Function Research 16 (2), 143-152, 1996

    Japanese Society of Aphasiology (Renamed as Japan Society for Higher Brain Function)

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