Verbal visual extinction in right/left hemisphere lesion patients and the problem of lexical access
Verbal visual extinction in right/left hemisphere lesion patients and the problem of lexical access
复制标题
左右半球病变患者的言语视觉消退和词汇访问问题
DOI：
10.1016/0028-3932(87)90095-9
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发表时间：
1987
期刊：
影响因子：
2.6
通讯作者：
F. Michèl
中科院分区：
文献类型：
--
作者：
É. Siéroff;F. Michèl
为了探索视觉词汇访问之前的感知过程，我们比较了右半球或左半球受损患者的两个视觉半区的单个单词阅读。单词在三种情况下以速视方式呈现：（1）一个视觉半域中有一个单词，（2）两个单词，中央凹旁边的每个视觉半域各有一个单词，（3）两个视觉半域中有一个较长的单词，以中央凹为中心。在许多患有右半球和左半球病变的患者中，单侧呈现的读数保持正常，而双侧呈现则导致病变对侧半视野的消光。然而，长中心词的右侧或左侧部分的消失并不常见。事实证明，以枕-颞-顶叶区域为中心的病变中，消退最为常见。此外，我们发现在言语二分听力中视觉消退与听觉消退无关。
In order to explore perceptual processes preceding visual lexical access, we compared single words reading in both visual hemifields in right or left hemisphere damaged patients. Words were tachistoscopically presented in three conditions: (1) one word in one visual hemifield, (2) two words, one in each visual hemifield aside the fovea, (3) one longer word in both visual hemifields, centred on the fovea. In many patients, suffering from right as well as left hemisphere lesions, reading remains normal for unilateral presentation whereas bilateral presentation induced extinction in the hemifield contralateral to the lesion. Nevertheless, extinction was not frequently observed for the right or the left part of long centred words. Extinction proved to be most frequent in lesions centred on the occipito-temporo-parietal area. In addition, we found visual extinction not to be related to auditory extinction in verbal dichotic listening.