脳梁膨大部の脳出血でみられた近時記憶障害

A Case of Amnesia Caused by a Subcortical Hematoma in the Left Retrosplenial Region

Ⅰ．はじめに

　古くからPapezの回路と記憶との関係が論じられ，海馬や視床病変で健忘症候群が生じたとする報告は多い^6）．一方，脳弓や脳梁膨大部後部領域の病変でも記憶障害がみられることが知られているが，その報告例は少ない^{1,4,9,15,16,18）}．今回われわれは，脳梁膨大部後部領域の病変由来と思われる記憶障害を呈した脳出血の1例を経験したので報告する．

A 54-year-old right-handed woman suffered transient aphasia and persistent amnesia caused by a subcortical he-matoma in the left occipital lobe. She appeared to have aphasia, although it disappeared within 3 weeks. It is notewor-thy that she had a lesion in the left retrosplenial region but exhibited both verbal and non-verbal memory impairment. However, her intelligence, remote memory and digit span were normal.