在典型的影像和幻想中视觉心理图像:一个毫米尺度的7-T fMRI研究
Jianghao Liu1, Minye Zhan2, Dounia Hajhajate3
1Sorbonne Université, Inserm, CNRS, Paris Brain Institute, ICM, Hôpital de la Pitié-Salpêtrière, Paris, France; Dassault Systèmes, Vélizy-Villacoublay, France.
概括
患有先天性阿芬坦西亚的个体在视觉心理图像回路中表现出功能连接性降低. 这表明有意识的视觉体验依赖于集成的大脑网络活动,影响知觉和想象力.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 神经成像是一种神经成像.
背景情况:
- 先天性幻觉症影响4%的人,导致无法想象物体,尽管完好无损的描述能力.
- 了解这种差异的神经基础,可以让我们深入了解意识的处理和意识.
研究的目的:
- 研究视觉心理图像和感知的神经机制.
- 阐明在先天性幻觉症中内部生成的视觉信息处理的神经基础.
主要方法:
- 使用超高场7T功能磁共振成像 (fMRI).
- 在五个领域 (物体形状,颜色,单词,面孔,空间关系) 进行图像和感知任务时,比较了十个典型的图像和十个先天性幻觉症患者的脑活动.
主要成果:
- 典型的成像器显示左半球前对面区域的激活,域偏好的腹腔皮和域一般的形图像节点 (FIN).
- 虚幻的个体表现出类似的视觉区域激活,但在FIN和前面对面区域之间功能连接性降低.
结论:
- 识别了用于视觉心理图像的域一般和域特定电路.
- 在aphantasia的这些电路中表现出功能失调.
- 支持了有意识的视觉体验的假设,无论是感知还是想象,都取决于高层视觉皮质和前端双相网络之间的综合活动.
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