右後頭葉視中枢梗塞後に幻視(complex visual hallucination)が反復出現した1症例  [in Japanese] A Case with Recurrent Simple Partial Seizures Consisting of Complex Visual Hallucinations after Right Occipital Visual Cortex Infarction  [in Japanese]

Access this Article

Search this Article

Author(s)

Abstract

症例は78歳, 男性。左半側視野に突然出現し, 短時間で消失する陽性の要素性視覚発作;幻視 (犬の親子が笑いかけているのが見える, 色のついた花畑が見える) が長期にわたり反復出現した。CT, MRIで右後頭葉視中枢に梗塞が確認され, 発作間歇時の光刺激と図形刺激による賦活脳波では左または右後頭部に鋭徐波様を示すβtrainが賦活された。VEPでは右後頭葉皮質の異常が示された。右後頭葉内側の一次視覚領 (area17) の周囲にてんかん原性が形成され, この部位と左後頭葉からのてんかん発射が二次視覚領も巻き込み, 頭頂葉や側頭葉にかけて発作発射が伝播し, 複雑な幻視 (complex visual hallucination) からなる陽性の視覚発作が出現したものと考えた。

A 78-year-old man developed simple partial seizures after right occipital visual cortex infarction which was found by CT, MRI, had been recurrent for a period of four years.<BR>He complained of sudden occurrence of visual elementary epileptic seizures consisting of complex visual hallucinations: laughing dogs or a colored flower garden in his left hemifield. An interictal EEG showed sharp-and-slow like activity in the left or right occipital area. VEP showed disturbances of function of the right occipital visual cortex. These complex visual hallucinations were epileptic in origin, because the images were usually silent and brief, but recurrent.<BR>Carbamazepine was effective for treating this simple partial seizure. These symptoms may be of occipital lobe origin, and the lesions of temporal and parietal lobes were also implicatied.

Journal

  • Journal of the Japan Epilepsy Society

    Journal of the Japan Epilepsy Society 13(2), 148-153, 1995-06-30

    JAPAN EPILEPSY SOCIETY

References:  9

Cited by:  1

Codes

  • NII Article ID (NAID)
    10008555386
  • NII NACSIS-CAT ID (NCID)
    AN10043823
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    09120890
  • Data Source
    CJP  CJPref  J-STAGE 
Page Top