University of Victoria, Victoria, British Columbia, Canada.
Psychon Bull Rev. 2009 Dec;16(6):1106-11. doi: 10.3758/PBR.16.6.1106.
We provide evidence that the locus coeruleus-norephinephrine (LC-NE) system is the neurophysiological basis of the attentional blink. The attentional blink refers to decreased accuracy for reporting the second of two targets in a rapid serial visual presentation of distractors. The LC-NE account of the attentional blink posits that targets elicit a facilitative LC-NE system response that is available for the first target but subsequently unavailable to the second, due to the autoinhibitory nature of the LC-NE system. We propose a modification of the LC-NE account, suggesting that the LC-NE system response is elicited by interference between mutually exclusive responses demanded by temporally proximal targets and distractors. We increased the interference between the first target and the following distractor by reducing the time between them. For identifying the second target this high-interference condition yielded a benefit up to 200 msec after onset of the first, followed by a decrease in accuracy. Consistent with our modification of the LC-NE account, this result suggests a temporarily enhanced LC-NE system response to increased target-distractor interference.
我们提供的证据表明，蓝斑去甲肾上腺素（LC-NE）系统是注意瞬脱的神经生理基础。注意瞬脱是指在快速呈现分散注意的刺激物的序列中，报告两个目标中的第二个目标的准确性降低。LC-NE 对注意瞬脱的解释假定，目标会引起促进 LC-NE 系统的反应，这种反应对于第一个目标是可用的，但随后对于第二个目标不可用，这是由于 LC-NE 系统的自抑制性质。我们提出了对 LC-NE 解释的修改，建议 LC-NE 系统的反应是由时间上接近的目标和分散注意物之间相互排斥的反应之间的干扰引起的。我们通过减少它们之间的时间来增加第一个目标和随后的分散注意物之间的干扰。对于识别第二个目标，这种高干扰条件在第一个目标出现后最多 200 毫秒产生了益处，随后准确性降低。与我们对 LC-NE 账户的修改一致，这一结果表明，对增加的目标-分散注意物干扰，LC-NE 系统的反应暂时增强。
