Ameliorating neglect with prism adaptation:: visuo-manual and visuo-verbal measures
Ameliorating neglect with prism adaptation:: visuo-manual and visuo-verbal measures
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DOI：
10.1016/s0028-3932(01)00186-5
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发表时间：
2002-01-01
期刊：
影响因子：
2.6
通讯作者：
Làdavas, E
中科院分区：
文献类型：
--
作者：
Farnè, A;Rossetti, Y;Làdavas, E
先前的研究表明，适应于平行移位棱镜可以改善忽视患者在视觉手动（VM）任务中的表现，例如线取消，图形复制和线平分[Nature 395（1998）166]。本研究进一步评估棱镜适应（PA）对忽视症状的影响，包括：（a）对常见的视觉空间缺陷以及不常见的现象如忽视阅读障碍的有益影响范围;（B）单次暴露于右视偏后改善的持续时间;（c）在VM任务和视觉-言语（V-V）任务中，视觉-空间表现相对改善的程度（即，分别涉及或不涉及适应臂）和（d）由棱镜适应引起的手动视觉运动偏差的存在和持续时间（即，后效）。我们调查了一组右半球损伤的忽视患者的这些问题，他们也受到忽视性阅读障碍的影响。在一次短暂的棱镜适应后，结果表明：（a）几种视觉空间能力，包括阅读单个单词和非单词的准确性，大大提高，（B）改善是持久的，持续至少24小时，（c）忽视改善的存在、数量和持续时间不限于VM任务，（4）棱镜适应诱发的后效的存在和持续时间显著地影响忽视症状改善的存在和持续时间。这些发现清楚地表明，由单个PA诱导的有益效果非常持久，并且在广泛的视觉空间缺陷中传播，与所需的反应类型无关。此外，我们的研究结果强烈表明，适应的过程中，所揭示的视觉运动后效应的存在，可能是必不可少的建立改善。根据其特点，棱镜适应技术应是一个优先工具，多方面的半侧空间忽视综合征的康复。(C)2002年爱思唯尔科学有限公司保留所有紧身衣。
Previous studies have shown that adaptation to rightward displacing prisms improves performance of neglect patients on visuo-manual (VM) tasks such as line cancellation, figure copying, and line bisection [Nature 395 (1998) 166]. The present study further evaluated the effect of prism adaptation (PA) on neglect symptoms by investigating: (a) the range of beneficial effects on common visuo-spatial deficits as well as less frequent phenomena like neglect dyslexia; (b) the duration of improvement following a single exposure to the right optical deviation; (c) the extent to which visuo-spatial performance can be comparatively ameliorated in VM tasks and visuo-verbal (V V) tasks ( i.e. involving or not the adapted arm, respectively) and (d) the presence and duration of the manual visuo-motor bias induced by the prismatic adaptation (i.e. the after-effect). We investigated these issues in a group of neglect patients with right hemispheric damage who were also affected by neglect dyslexia. Following a single, brief prismatic adaptation the results showed that (a) several visuo-spatial abilities, including accuracy in reading single words and non-words, considerably improved, (b) the amelioration was long-lasting, continuing for at least 24h, (c) the presence, amount, and duration of neglect amelioration was not limited to VM tasks, but extended to VV tasks and (d) the presence and duration of the after-effect induced by prismatic adaptation remarkably paralleled the presence and duration of the improvement of neglect symptoms. These findings clearly demonstrate that beneficial effects induced by a single PA are very loner lasting and spread over a wide range of visuo-spatial deficits, independent of the type of response required. In addition, our results strongly suggest that the process of adaptation, as revealed by the presence of a visuo-motor after-effect, might be essential for establishing amelioration. In light of its characteristics, the prismatic adaptation technique should be a priority tool for the rehabilitation of the multifaceted hemispatial neglect syndrome. (C) 2002 Elsevier Science Ltd. All tights reserved.