半側無視症例における課題の大きさがその成績に及ぼす影響の検討

Effects of the performance on unilateral neglect patients using various sizes of test paper

要旨：48人の対象者(26人の左片麻痺患者)に対し，線分二等分テスト，線分抹消テスト，写字テストの検査を実施した．それぞれの検査課題は2種類の異なるサイズのテスト用紙を用い，交互に遂行させた．各課題成績の変動性を中心として検討した結果，正常範囲にある左片麻痺患者中に，線分二等分テスト初回試行の等分点正常範囲からの逸脱パターンが観察された．用紙サイズの直接的な影響は明確にならなかったが，半側無視では先行刺激大，小の交互変換の影響を受けることが推察された．今回の検査デザインは，従来の線分二等分テストでは潜在化した左半側無視の症状を捉えるものとして有益と考えられた．

　We examined 48 subjects including 26 left-hemiplegia patients using the line-bisection and Albert's cancellation tests, to clarify the characteristics of their unilateral neglect pattern.

　We investigated the effect of changing the size of test paper on their neglect disturbance and tried to categorize the patterns of a line-bisection test by their variation. Paper of two sizes was systematically presented for inspection, and the effect of the size was compared. There was no significant difference among the normal control, the right hemiplegia and left hemiplegia patients. However, some lefthemiplegia patients, whose performance on the first bi-section point located within a normal range, showed right or left deviation in other trials. In the cases of severe neglect, the effect of the paper size was bigger than for other cases. Our result would be useful in the evaluation of unilateral neglect not found by conventional tests.