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Nihon Ronen Igakkai Zasshi · Mar 2008
Review Case Reports[Pure amnesia due to the right capsular genu infarction].
- Yuji Kato, Yoshikazu Mizoi, Toshimasa Yamamoto, Naotoshi Tamura, Tomokazu Shimazu, and Kunio Shimazu.
- Department of Neurology, Saitama Medical University.
- Nihon Ronen Igakkai Zasshi. 2008 Mar 1; 45 (2): 220-4.
AbstractA 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 (99m)Tc-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.
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