Pure amnesia due to the right capsular genu infarction

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  • 高度の健忘症を呈した右内包膝部梗塞の１例
  • 症例報告 高度の健忘症を呈した右内包膝部梗塞の1例
  • ショウレイ ホウコク コウド ノ ケンボウショウ オ テイシタ ミギ ナイホウシツブ コウソク ノ 1レイ

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Abstract

A 77-year-old right-handed woman was admitted to our hospital with memory disturbance. Neurological examination was normal except for amnesia. Neuropsychological tests showed severe impairments in verbal and visual memories. Brain MRI revealed a fresh lacunar infarction in the genu of the right internal capsule. Decreased perfusion in the right thalamus and frontal lobe on 99mTc-ECD SPECT was attributable to disconnection of the thalamo-cortical tract by infarction. We consider that the patient's amnesia in this case was induced by infarction of the capsular genu, which includes some fibers from the anterior and inferior thalamic peduncles. Our findings demonstrated that lacunar infarction in the genu of the right internal capsule caused severe and persistent amnesia.<br>

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