Samar V J
Brain Cogn. 1983 Oct;2(4):355-82. doi: 10.1016/0278-2626(83)90019-2.
Evoked potentials to laterally presented stimuli were collected from left and right tempero-parietal sites during performance of two visual half-field tasks, lexical decision, and line orientation discrimination. Reaction time and accuracy data were simultaneously collected. The behavioral data indicated the development of a right field advantage for the lexical decision task as a function of practice. A principal components analysis revealed three independent evoked potential components which displayed task-dependent hemispheric asymmetries. Multiple regression analyses revealed that visual half-field asymmetries in response accuracy were closely related to hemispheric asymmetries on several independent evoked response components. Subject's scores on independent tests of verbal reasoning and spatial relations were also found to be closely related to hemispheric asymmetry on several independent evoked response components. These data support a multidimensional concept of cerebral specialization. They also suggest that visual field asymmetries reflect the confluence of several underlying processes which have independent lateralization distributions across the population. In general, the results underscore the need for further research on the nature of the relationship between cerebral and perceptual asymmetries.
在执行两项视觉半视野任务（词汇判断和线条方向辨别）期间，从左右颞顶叶部位收集对侧向呈现刺激的诱发电位。同时收集反应时间和准确性数据。行为数据表明，随着练习，词汇判断任务出现了右视野优势。主成分分析揭示了三个独立的诱发电位成分，它们表现出与任务相关的半球不对称性。多元回归分析表明，反应准确性方面的视觉半视野不对称与几个独立诱发电位成分上的半球不对称密切相关。还发现，受试者在言语推理和空间关系独立测试中的得分与几个独立诱发电位成分上的半球不对称密切相关。这些数据支持大脑专门化的多维概念。它们还表明，视野不对称反映了几个潜在过程的汇合，这些过程在人群中具有独立的偏侧化分布。总体而言，结果强调了进一步研究大脑与感知不对称之间关系本质的必要性。
