Rastatter M P, Stuart A
Department of Communication Sciences and Disorders, East Carolina University, Greenville, North Carolina 27858-4353, USA.
Percept Mot Skills. 1995 Dec;81(3 Pt 1):899-908. doi: 10.2466/pms.1995.81.3.899.
The present study was done to investigate the linguistic organization of the right hemisphere of stuttering subjects and the interhemispheric interactions that underlie verbal output in this population. Naming reaction times of 14 stuttering adults were measured to unilaterally presented pictures corresponding to vocabulary levels of < 5.5, 9.5-10.5, and > 18.0 years of age. An analysis of variance of latencies showed a significant main effect for picture vocabulary-age. Post hoc tests were interpreted as suggesting that the right hemisphere of stuttering subjects was capable of differential picture-encoding operations in a manner similar to the left hemisphere of normal speakers. Also, naming latencies favored left visual-field stimulations by 34 msec. Taken with significant and high correlations between visual fields for each level of picture vocabulary score, the right hemispheres of the stuttering subjects appeared responsible for picture-encoding operations. Left-hemispheric stimulus processing was not predicted, suggesting differences may exist in interhemispheric interactions underlying picture-naming functions in stuttering populations.
本研究旨在调查口吃受试者右半球的语言组织以及该人群言语输出背后的半球间相互作用。测量了14名口吃成年人对单侧呈现的、对应于词汇水平低于5.5岁、9.5 - 10.5岁和高于18.0岁的图片的命名反应时间。潜伏期的方差分析显示图片词汇年龄有显著的主效应。事后检验被解释为表明口吃受试者的右半球能够以类似于正常说话者左半球的方式进行不同的图片编码操作。此外，命名潜伏期对左视野刺激的偏好为34毫秒。结合每个图片词汇分数水平的视野之间显著且高度的相关性，口吃受试者的右半球似乎负责图片编码操作。未预测到左半球的刺激处理情况，这表明口吃人群中图片命名功能背后的半球间相互作用可能存在差异。
