Rushby Jacqueline A, Barry Robert J
Brain & Behaviour Research Institute, School of Psychology, University of Wollongong, Northfields Ave, Wollongong NSW 2522, Australia.
Biol Psychol. 2007 Jul;75(3):248-59. doi: 10.1016/j.biopsycho.2007.03.003. Epub 2007 Mar 30.
We examined putative central nervous system (CNS) indices of tonic and phasic aspects of the orienting reflex (OR) in a passive event-related potential (ERP) dishabituation paradigm. Pre-stimulus skin conductance level (SCL) and the subsequent skin conductance response (SCR) were used as tonic and phasic OR "yard-sticks", respectively. Their stimulus-response patterns were used to assess two ERP components: the tonic pre-stimulus contingent negative variation (CNV) and the subsequent phasic late positive complex (LPC). SCLs and SCRs derived from each trial of the first train presented were compatible with traditional OR studies. Across-train means were also derived for each of the four measures examined. Arousal changes, as indexed by the SCL, were weak in the CNV which showed an additional expectancy effect. The LPC showed a stimulus-response pattern across trials identical to that of the SCR. This study clarifies links between the traditional autonomic measures of the indifferent OR and its CNS correlates, and encourages an OR perspective and/or interpretation of ERP effects.
我们在一个被动事件相关电位（ERP）消退范式中，研究了定向反射（OR）的紧张性和相位性方面的假定中枢神经系统（CNS）指标。刺激前皮肤电导水平（SCL）和随后的皮肤电导反应（SCR）分别被用作紧张性和相位性OR的“衡量标准”。它们的刺激 - 反应模式被用于评估两个ERP成分：紧张性刺激前的关联性负变化（CNV）和随后的相位性晚期正复合波（LPC）。首次呈现的每一组试验中得出的SCL和SCR与传统的OR研究结果相符。对于所检查的四项指标中的每一项，也得出了跨组均值。由SCL所指示的唤醒变化在CNV中较弱，CNV还显示出额外的预期效应。LPC在各试验中的刺激 - 反应模式与SCR相同。本研究阐明了传统的无关OR自主测量指标与其CNS相关指标之间的联系，并鼓励从OR的角度和/或对ERP效应进行解释。
