The medial temporal area and parietal lobe are involved in epileptic polyopia and palinopsia: A case report

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Other Title
  • てんかん性視覚保続発作に内側側頭葉と頭頂葉の関与が示唆された1例
  • 症例報告 てんかん性視覚保続発作に内側側頭葉と頭頂葉の関与が示唆された1例
  • ショウレイ ホウコク テ ンカンショウ シカクホゾク ホッサ ニ ウチガワ ソクトウヨウ ト トウチョウ ヨウ ノ カンヨ ガ シサ サレタ 1レイ

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This report presents the case of an 83-year-old female with a tumor in the right temporal lobe. She experienced various epileptic visual auras including visual perseveration. Visual perseveration is classified into polyopia and palinopsia. Epileptic visual perseveration is a rare phenomenon, and the mechanism has not been fully explained. MRI revealed a tumor in the right temporal lobe with edema in the occipital white matter. To reveal mechanisms of epileptic polyopia and palinopsia, we recorded EEG and 123I-IMP-SPECT when she experienced epileptic attacks. EEG showed epileptic discharges beginning at the occipital area, which spread to the temporal and parietal areas. During the EEG recording, the main symptom was an unformed hallucination. SPECT showed that blood flow increased in the right medial temporal and parietal lobes and, to a slightly lesser extent, in the right occipito-temporal area when the polyopia and palinopsia frequently appeared. Involvement of the multiple foci may have caused the different kinds of visual symptoms. The medial temporal and parietal areas were likely responsible for polyopia and palinopsia at least for this patient.<br>

Journal

  • Rinsho Shinkeigaku

    Rinsho Shinkeigaku 52 (9), 651-655, 2012

    Societas Neurologica Japonica

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