NIMH Center for the Study of Emotion and Attention, University of Florida, Gainesville, Florida 32608, USA.
Psychophysiology. 2011 Jan;48(1):112-6. doi: 10.1111/j.1469-8986.2010.01041.x.
Viewing a series of aversive pictures prompts emotional reactivity reflecting sustained defensive engagement. The present study examined the effects of a concurrent visual task on autonomic, somatic, electrocortical, and facial components of this defensive state. Results indicated that emotional activation was largely preserved despite continuous visual distraction, although evidence of attenuation was observed in startle reflex and electrocortical measures. Concurrent task-specific reactivity was also apparent, suggesting that motivational circuits can be simultaneously activated by stimuli with intrinsic survival significance and instructed task significance and that these processes interact differently across the separate components of defensive engagement.
观看一系列令人厌恶的图片会引发情绪反应，反映出持续的防御性参与。本研究考察了同时进行的视觉任务对这种防御状态的自主、躯体、脑电和面部成分的影响。结果表明，尽管存在持续的视觉干扰，但情绪激活在很大程度上得以保留，尽管在惊吓反射和脑电测量中观察到了衰减的证据。同时还出现了与任务相关的特定反应性，这表明动机回路可以同时被具有内在生存意义和指令任务意义的刺激激活，并且这些过程在防御性参与的不同组成部分中相互作用不同。
