Birbaumer N, Elbert T, Lutzenberger W, Rockstroh B, Schwarz J
Biol Psychol. 1981 Dec;13:251-60. doi: 10.1016/0301-0511(81)90040-5.
Mental arithmetic is supposed to be processed by the left hemisphere, while pattern matching has been considered to be processed by the right hemisphere. These different mental tasks were presented to 16 right-handed male subjects. As a variable task difficulty was varied for the two task categories. The task presentations were preceded by 6 sec warning stimuli which indicated the level of difficulty of the task. EEG and slow cortical potentials (SCPs) were recorded from temporal and precentral leads of both hemispheres. The reference was noncephalic. During the anticipation interval beta-activity was enhanced above the hemisphere primarily involved in the particular task. SCPs failed to show a comparable clear pattern. A late negative component showed task-dependent asymmetries prior to easy tasks, but not prior to difficult tasks.
心算被认为是由左半球处理的，而模式匹配则被认为是由右半球处理的。这两种不同的心理任务被呈现给16名右利手男性受试者。由于任务难度是这两类任务的可变因素。任务呈现之前有6秒的警告刺激，指示任务的难度水平。从两个半球的颞叶和中央前导记录脑电图和慢皮层电位（SCPs）。参考电极是非头部的。在预期间隔期间，β活动在主要参与特定任务的半球上方增强。SCPs未能显示出类似的清晰模式。一个晚期负成分在简单任务之前显示出任务依赖的不对称性，但在困难任务之前没有。
