Barnett Benjy, Andersen Lau M, Fleming Stephen M, Dijkstra Nadine
Wellcome Centre for Human Neuroimaging, University College London, London WC1N 3AR, UK.
Department of Experimental Psychology, University College London, London WC1H 0AP, UK.
PNAS Nexus. 2024 Feb 14;3(2):pgae061. doi: 10.1093/pnasnexus/pgae061. eCollection 2024 Feb.
Some conscious experiences are more vivid than others. Although perceptual vividness is a key component of human consciousness, how variation in this magnitude property is registered by the human brain is unknown. A striking feature of neural codes for magnitude in other psychological domains, such as number or reward, is that the magnitude property is represented independently of its sensory features. To test whether perceptual vividness also covaries with neural codes that are invariant to sensory content, we reanalyzed existing magnetoencephalography and functional MRI data from two distinct studies which quantified perceptual vividness via subjective ratings of awareness and visibility. Using representational similarity and decoding analyses, we find evidence for content-invariant neural signatures of perceptual vividness distributed across visual, parietal, and frontal cortices. Our findings indicate that the neural correlates of subjective vividness may share similar properties to magnitude codes in other cognitive domains.
一些有意识的体验比其他体验更生动。尽管感知生动性是人类意识的关键组成部分，但人类大脑如何记录这种量级属性的变化尚不清楚。在其他心理领域，如数或奖励方面，量级的神经编码的一个显著特征是，量级属性的表征独立于其感觉特征。为了测试感知生动性是否也与对感觉内容不变的神经编码相关，我们重新分析了来自两项不同研究的现有脑磁图和功能磁共振成像数据，这两项研究通过对意识和可见性的主观评分来量化感知生动性。使用表征相似性和解码分析，我们发现了跨视觉、顶叶和额叶皮质分布的感知生动性的内容不变神经特征的证据。我们的研究结果表明，主观生动性的神经关联可能与其他认知领域的量级编码具有相似的属性。
