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I.緒言
Bielschowsky1)は1902年に末梢性でも中枢性でもない特殊な外眼筋の麻痺について述べ,これをsupranucleäle Parase (核上性麻痺)と記載した。L'hermitte2)(1922)はこのような症例にOphthalmoplegia internuclearis (核間性眼筋麻痺)という表現を用い,さらにJaensch (1924,1930)3)4)やLutz (1923)5)は核間性眼筋麻痺の原因である病巣部位が脳橋にある内側縦束の動眼神経核に近い前部にある場合をOphthalmople—gia internuclearis anteriorとし,外転神経核に近い後部にある時を,Ophthalmoplegia inte—rnuclearis posteriorと呼んでそれぞれに特有な所見を述べた。またHaymaker (1964)6)はこれをsuperior internuclear Ophthalmoplegia(上部核間性眼筋麻痺)とinferior internuclearOphthalmoplegia (下部核間性眼筋麻痺)に分け,Cogan (1950)7)は内側縦束の脳橋における障害部位を前部,中間部,後部に分けてそれぞれの症状を記載した。
A case of a woman aged 52, in which bila-teral internuclear ophthalmoplegia posterior set in, is described. Cardinal ophthalmological signs consisted of paralysis of bilateral hori-zontal gaze. The left eye was affected more severely, so that the paralysis was almost complete. The right eye remained in slightlyabducted position with horizontal nystagmus. Diplopia appeared following attempted gaze either to left or right. Convergence was unaffe-cted and normal. There was slight hemihypes thesia in the right side and left-sided facial hemiparesis.
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