School of Psychology, University of New South Wales, Sydney, Australia.
School of Psychological Sciences, Macquarie University, Sydney, Australia.
Elife. 2022 Mar 31;11:e72484. doi: 10.7554/eLife.72484.
The pupillary light response is an important automatic physiological response which optimizes light reaching the retina. Recent work has shown that the pupil also adjusts in response to illusory brightness and a range of cognitive functions, however, it remains unclear what exactly drives these endogenous changes. Here, we show that the imagery pupillary light response correlates with objective measures of sensory imagery strength. Further, the trial-by-trial phenomenological vividness of visual imagery is tracked by the imagery pupillary light response. We also demonstrated that a group of individuals without visual imagery (aphantasia) do not show any significant evidence of an imagery pupillary light response, however they do show perceptual pupil light responses and pupil dilation with larger cognitive load. Our results provide evidence that the pupillary light response indexes the sensory strength of visual imagery. This work also provides the first physiological validation of aphantasia.
瞳孔光反应是一种优化光线到达视网膜的重要自动生理反应。最近的研究表明，瞳孔也会根据幻觉亮度和一系列认知功能进行调节，然而，尚不清楚是什么驱动了这些内源性变化。在这里，我们表明想象性瞳孔光反应与感觉想象强度的客观测量相关。此外，想象性瞳孔光反应还可以跟踪视觉想象的逐次现象学生动性。我们还证明，一组没有视觉想象的个体（想象缺失）没有表现出任何明显的想象瞳孔光反应证据，但是他们确实表现出与更大认知负荷相关的知觉瞳孔光反应和瞳孔扩张。我们的结果提供了证据表明瞳孔光反应指数化了视觉想象的感觉强度。这项工作还首次对想象缺失进行了生理学验证。
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