Furedy J J, Shulhan D L, Scher H
Physiol Behav. 1986;36(5):983-6. doi: 10.1016/0031-9384(86)90465-8.
Psychophysiological studies, which measure small changes in T-wave amplitude (TWA) induced by behavioral manipulations, usually employ a single electrode placement for obtaining the ECG. The present study varied electrode placement (EP) within subjects among three EPs that have been reported in the literature (a lead-II limb placement, and two chest placements) to determine whether, as has been claimed, the direction of TWA changes can be changed by varying EP. Both HR and TWA were monitored in 24 males during the Baseline, Listen, and Task phases of an iterative subtraction task. The EP variation did not affect the direction of TWA change. Reliable TWA attenuation accompanied by HR acceleration was observed in all leads.
心理生理学研究通过测量行为操作引起的T波振幅（TWA）的微小变化来进行，通常采用单一电极位置来获取心电图。本研究在受试者内部改变电极位置（EP），在文献中报道的三种电极位置（II导联肢体位置和两种胸部位置）之间进行变化，以确定是否如所声称的那样，通过改变电极位置可以改变TWA变化的方向。在一项迭代减法任务的基线、聆听和任务阶段，对24名男性的心率（HR）和TWA进行了监测。电极位置的变化并未影响TWA变化的方向。在所有导联中均观察到可靠的TWA衰减并伴有心率加速。
