主要视觉皮层中的感官表现不足以用于主观图像
Giulia Cabbai1, Chris Racey1, Julia Simner1
1School of Psychology, University of Sussex, Brighton BN1 9QH, UK; Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9RH, UK.
Current biology : CB
|October 17, 2024
概括
视觉皮层 (V1) 中的感觉大脑表现可以在没有主观心理图像的情况下存在,正如阿芬塔西亚患者所示. 这表明神经活动与有意识的视觉体验之间存在分离.
科学领域:
- 认知神经科学 认知神经科学
- 神经成像是一种神经成像.
- 心理学 心理学 心理学
背景情况:
- 心理图像是由感官表示和主观经验来定义的.
- 神经成像显示了初级视觉皮层 (V1) 中与图像相关的感官表现,类似于感知.
- 目前尚不清楚V1的表现是否总是与主观经验相关.
研究的目的:
- 调查V1中的感官表示是否可以与主观视觉图像分离.
- 为了比较可视化者和奇幻者 (图像能力受损的个体).
- 检查自发和自愿的图像,将表示与生成能力分开.
主要方法:
- 多变量功能磁共振成像 (fMRI) 用于解码 V1.1 中的感官表示.
- 参与者包括可视化器和神奇动物.
- 分析了自发性 (被动倾听) 和自愿性 (受指示) 图像任务中的脑活动,同时蒙着眼睛.
主要成果:
- 尽管没有报告的图像,但在被动听力期间,V1对声音内容的解码在Aphantasics中取得了成功,但在自愿图像期间是偶然的.
- 在可视化器中,V1解码对于自愿的比自发的图像更高,并且与生动性相关.
- 在两个条件下,Precuneus解码在可视化器中成功,但在phantasics中没有成功.
结论:
- 主要视觉皮层 (V1) 的表现可以从主观心理图像中分离出来.
- 前皮在主观视觉图像中起着至关重要的作用.
- 这些发现挑战了感官表现始终伴随着意识图像的概念.
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