Wells B G, Moore W H
Communicative Disorders Department, California State University, Long Beach 90840.
Neuropsychologia. 1990;28(12):1295-305. doi: 10.1016/0028-3932(90)90045-p.
The EEG hemispheric alpha asymmetry technique was used to gather data from anterior and posterior language areas during a resting condition and in a sentence repetition task. Subjects were nine adult stuttering males and nine adult fluent male controls. Sentences were controlled for imagery, syntactic complexity, and rate. Significant within- and between-groups differences were found for both resting and testing conditions. Posteriorly, stutterers showed no differences between resting and testing conditions, while controls showed increased left hemisphere activation. Of the linguistic variables investigated, only imagery was involved in a significant interaction. Fluent males showed greater posterior left hemispheric activation for high and low visual imagery sentences, compared to greater posterior right hemispheric activation in stuttering males. Significantly greater alpha power was found for low vs high imagery sentences in the anterior and posterior left hemisphere sites for both subject groups, and in the right hemisphere sites for the stuttering group only. Fluency data is presented. Differences between groups in alpha power changes from resting to testing conditions are discussed.
采用脑电图半球α不对称技术，在静息状态和句子复述任务期间，从前语言区和后语言区收集数据。受试者为9名成年男性口吃者和9名成年男性流利语言者对照组。句子在意象、句法复杂性和语速方面得到控制。在静息和测试条件下，均发现了显著的组内和组间差异。在后语言区，口吃者在静息和测试条件之间没有差异，而对照组显示左半球激活增加。在所研究的语言变量中，只有意象参与了显著的交互作用。与口吃男性右半球后语言区激活增加相比，流利语言男性在高视觉意象和低视觉意象句子中左半球后语言区激活更大。两个受试者组在前语言区和左半球后语言区部位，以及仅口吃组在右半球部位，低意象句子比高意象句子的α功率显著更大。呈现了流利度数据。讨论了从静息到测试条件下，两组之间α功率变化的差异。
