Pupil dilation reflects perceptual selection and predicts subsequent stability in perceptual rivalry
Pupil dilation reflects perceptual selection and predicts subsequent stability in perceptual rivalry
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DOI：
10.1073/pnas.0707727105
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发表时间：
2008-02-05
影响因子：
11.1
通讯作者：
Carter, Olivia
中科院分区：
文献类型：
--
作者：
Einhaeuser, Wolfgang;Stout, James;Carter, Olivia
在持续观看模棱两可的刺激时，个体的知觉体验通常会在不同的可能选择之间切换，而不是停留在一种解释(知觉竞争)上。在这里，我们测量了受试者在观看不同模糊的视觉和听觉刺激时的瞳孔直径。对于所有测试的刺激，在报告的知觉转换之前，瞳孔直径增加，而在此转换之前的相对扩张量是随后知觉稳定持续时间的重要预测因素。这些结果不能用眨眼或眼动效应、运动反应或刺激驱动的视网膜输入变化来解释。由于瞳孔扩张反映了蓝斑(LC)释放的去甲肾上腺素(NE)水平，我们将这些结果解释为LC-NE复合体可能在知觉选择和行为决策中发挥相同的作用。
During sustained viewing of an ambiguous stimulus, an individual's perceptual experience will generally switch between the different possible alternatives rather than stay fixed on one interpretation (perceptual rivalry). Here, we measured pupil diameter while subjects viewed different ambiguous visual and auditory stimuli. For all stimuli tested, pupil diameter increased just before the reported perceptual switch and the relative amount of dilation before this switch was a significant predictor of the subsequent duration of perceptual stability. These results could not be explained by blink or eye-movement effects, the motor response or stimulus driven changes in retinal input. Because pupil dilation reflects levels of norepinephrine (NE) released from the locus coeruleus (LC) we interpret these results as suggestive that the LC-NE complex may play the same role in perceptual selection as in behavioral decision making.