VERs in normal and disabled adult readers.
VERs in normal and disabled adult readers.
复制标题
正常和残疾成人读者的 VER。
作者：
M. S. Preston;J. Guthrie;I. Kirsch;D. Gertman;B. Childs
本研究的目的是评估视觉诱发反应（VER）技术在定位阅读过程中的作用，并探讨视觉诱发反应在正常和残疾读者之间的差异。从O1， O2， P3和P4中记录的ver都参考了连接的乳突，这些ver来自9名正常和9名精心挑选的残疾成人读者，在两种测试条件下：被动观看一系列无图案的闪光和一系列包含目标单词的常见三个字母的单词。得到了P100-N140和N140-P200的峰间幅值，以及P200和晚期正分量（LPC）的基线幅值。对数据进行了半球、顶叶-枕叶和组间差异的检查。主要发现有：1)仅单词刺激时P200和左脑LPC的振幅增加；2)与枕叶刺激相比，闪光和单词刺激时顶叶导联的LPC振幅增加，且单词刺激时的LPC振幅增加更大；3)在P200和LPC刺激下，正常者与残疾者相比，左顶叶电极上单词和闪光的差异更大。
The purposes of this study were to assess the visual evoked response (VER) technique in localizing the reading process and to explore VER differences between normal and disabled readers. VERs recorded from O1, O2, P3, and P4, all referenced to linked mastoids, were obtained from 9 normal and 9 carefully selected disabled adult readers under two test conditions: a series of non-patterned flashes of light viewed passively and a series of common three-letter words containing a target word. Peak-to-peak amplitude for P100-N140 and N140-P200, and amplitude from baseline for P200 and the late positive component (LPC) were obtained. The data were examined for hemispheric, parietal-occipital, and group differences. The main findings were: 1) increased amplitude for P200 and the LPC on the left side for word stimuli only, 2) increased LPC amplitude on the parietal leads compared to occipital for flash and word stimuli with greater increase for words, and 3) a larger difference between words and flash on the left parietal electrode for normals compared to disabled on the P200 and LPC measures.