忽视性失读症中空间表征的不等像性。

Anisometry of space representation in neglect dyslexia.

作者信息

Savazzi Silvia, Frigo Chiara, Minuto Domenico

机构信息

Department of Neurological and Vision Sciences, Section of Human Physiology, University of Verona, Strada le Grazie, 8 37134 Verona, Italy.

出版信息

Brain Res Cogn Brain Res. 2004 May;19(3):209-18. doi: 10.1016/j.cogbrainres.2003.12.003.

DOI:10.1016/j.cogbrainres.2003.12.003

PMID:15062859

Abstract

Patients with unilateral neglect show disorders in horizontal space perception. It has been argued that these disorders may depend on a left-right relaxation of the representational medium that becomes progressively "relaxed" toward the contralesional space and progressively "compressed" toward the ipsilesional space. We tested this hypothesis in 31 right-brain-damaged patients, 17 with neglect and 14 without neglect in two different experiments. Patients were asked to read words in canonical and anisometric letter spacing. Only in neglect patients, the manipulation of letters spacing may ameliorate neglect dyslexia. These results support the idea that the abnormalities observed in typical neglect tests are due to a distorted internal representation of the outside world. In addition, the space distortion seems to depend on the degree of horizontal relaxation of the representational medium and it is unrelated to hemianopia.

摘要

单侧忽视患者在水平空间感知方面存在障碍。有人认为，这些障碍可能取决于表征介质的左右松弛，这种松弛朝着对侧空间逐渐“放松”，朝着同侧空间逐渐“压缩”。我们在两个不同的实验中对31名右脑损伤患者进行了测试，其中17名有忽视症状，14名没有忽视症状。要求患者阅读字母间距规范和不等距的单词。仅在忽视患者中，字母间距的操纵可能会改善忽视性阅读障碍。这些结果支持了这样一种观点，即在典型的忽视测试中观察到的异常是由于对外部世界的内部表征扭曲所致。此外，空间扭曲似乎取决于表征介质的水平松弛程度，并且与偏盲无关。