视觉心理图像和神经动力学感官替代在蒙上眼睛的受试者感官替代
HongJune Kim1, June Sic Kim2, Chun Kee Chung3
1Dept. of Brain and Cognitive Sciences, Seoul National University, Seoul, Republic of Korea; Clinical Research Institute, Konkuk University Medical Center Seoul, Republic of Korea.
NeuroImage
|May 26, 2024
概括
蒙着眼睛的受试者可以从声音景观中发展出视觉心理图像. 这种感官替代依赖于综合的自下而上和自上而下大脑处理,以视觉解释听觉信息.
科学领域:
- 神经科学是一个神经科学.
- 感官感知是一种感官感知.
- 认知科学 认知科学
背景情况:
- 大脑处理感官信息和创造感知的能力是复杂的.
- 研究感官替代,即一种感官补偿失去的感官,为神经可塑性提供了见解.
- 了解听觉刺激如何唤起类似视觉感觉对于开发辅助技术至关重要.
研究的目的:
- 调查依据对声音景观的感知作为视觉或视觉类感觉的层次神经机制在蒙着眼睛的个体.
- 通过感官置换,阐明视觉大脑区域是如何被声景刺激所招募的.
- 确定最能解释从视觉形状信息转换成声音景观刺激的识别的大脑处理模型.
主要方法:
- 22名健康受试者接受了训练,以识别与视觉字母形状相关的音景刺激.
- 动态因果建模 (DCM) 是一种有效的连接方法,用于分析大脑活动.
- 分析了大脑区域之间的皮层源信号和光谱合 (内部频率和交叉频率).
主要成果:
- 与其他测试模型 (听觉自下而上,交叉模式,混合) 相比,视觉心理图像模型在产生皮质源信号方面表现出卓越的性能.
- 在自下而上的处理中观察到频率内合,这表明传感信息的传输.
- 交叉频率合在自上而下的处理中占据了突出地位,表明信息的预期和解释.
结论:
- 蒙眼对象的感官替代可以导致视觉心理图像的产生.
- 这个过程涉及到自下而上的和自上而下的神经处理的组合.
- 这些发现凸显了大脑的显著可塑性及其为新的感觉体验重新利用神经通路的能力.
相关概念视频
01:24Vision
53.1K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
53.1K
01:26Visual System
571
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Once through the pupil, the light passes through the lens, a...
571
01:20Parallel Processing
150
The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
150