Wallenberg症候群の眼振所見の変化について

The Direction and Quality of Nystagmus in Wallenberg's Syndrome

I．はじめに

　Wallenberg症候群でみられる眼振には一応規則性があり典型例の眼振は回旋性で患側に向かうものが多いといわれている。過去に本症候群の回旋性限振についてAndré Thomas^1）は患側に，Barré^2）は健側に向くと述べ，この問題についても多くの症例が報告されているが結論は出ていない。

　最近著者らは平衡障害に明らかな眼振を伴う本症候群を4例経験した。これらのうち2例において，眼振の方向と性質が日時の経過とともに変化するのを観察したので報告し考察を加えたい。

　The authors investigated nystagmus in four cases of Wallenberg's syndrome over a relatively long period of time. The direction of nystagmus in Case 1 was to the normal side in acute phase and tothe affected side in chronic phase. The direction of nystagmus in Case 2 was changed from the normal side to the affected side in chronic phase. The direction of nystagmus in Case 3 and 4 was to the normal side from the early stage.

　From Case I and 2 it was suggested that the direction of nystagmus might have changed with the progress of time.

　Quality of nystagmus changed with the progress of time in three out of four cases.