意识访问的感知和注意障碍涉及不同的神经机制,尽管相同的任务性能
Samuel Noorman1,2, Timo Stein1,2, Johannes Jacobus Fahrenfort1,2,3
1Department of Psychology, University of Amsterdam, Amsterdam, Netherlands.
eLife
|May 1, 2025
概括
意识访问的失败源于感知或注意力障碍. 注意力障碍不需要复杂的视觉特征处理,与感知障碍不同,揭示了有意识访问的独特的神经机制.
科学领域:
- 认知神经科学 认知神经科学
- 视觉感知 视觉感知 视觉感知
- 电力生理学 电力生理学
背景情况:
- 有意识的访问依赖于感官输入处理和注意力.
- 感知障碍 (弱输入) 和注意力障碍 (无监督输入) 可以破坏意识的访问.
- 了解这些障碍背后的独特神经机制至关重要.
研究的目的:
- 调查由于感知与注意力障碍而导致的意识访问失败.
- 在这两种障碍类型下区分简单和复杂的视觉特征的神经处理.
- 识别有助于意识访问的独特神经机制.
主要方法:
- 参与者在掩盖 (感知) 或注意力眼 (注意力) 任务中查看了具有不同特征复杂性的Kanizsa刺激 (局部对比度,对线性).
- 性能被等同于感知和注意操纵.
- 用分类器分析脑电图 (EEG) 数据来解码刺激特征处理.
主要成果:
- 局部对比度的早期处理 (~80 ms) 没有受到任何操纵的影响.
- 复杂特征 (对线性,虚幻三角形) 的晚期处理 (~200-250毫秒) 被掩盖而受损,但被注意力眼节省.
- 在两种损坏类型下,料后期加工保持不变.
结论:
- 与感知障碍不同的是,注意力障碍在性能匹配时保留了复杂视觉特征的处理.
- 独特的神经机制是影响意识访问的感知和注意障碍的基础.
- 这项研究阐明了对于实现意识意识至关重要的不同神经阶段.
更多相关视频
06:46Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
Published on: March 18, 2019
7.0K
07:12Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
Published on: April 11, 2025
204
相关概念视频
Parallel Processing
125
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...
125
Subconsciousness and No Awareness
201
The concept of subconscious awareness refers to the processing of information below the level of conscious thought, which significantly influences both behaviors and decisions. It is also known as waking subconscious awareness. This complex level of cognition operates without the direct awareness of the individual, facilitating rapid and simultaneous handling of multiple information streams.
An illustrative example of subconscious processing is its role in problem-solving. Often, individuals...
An illustrative example of subconscious processing is its role in problem-solving. Often, individuals...
201
High-Level and Low-Level Awareness
225
Controlled processes in human consciousness represent high-alert mental states where individuals deliberately focus their attention on achieving specific goals. Controlled processes can be seen in situations like mastering new technology, where a person might become so absorbed that they ignore surrounding distractions. Such processes involve selective attention, requiring one to concentrate on particular elements of experience while disregarding others. These are governed by executive...
225
Perception
404
Perception is a fundamental psychological process that enables individuals to organize, interpret, and consciously experience sensory information. This process is crucial for understanding and interacting with the world around us. It includes both bottom-up and top-down processing, each playing a distinct role in how we perceive our environment.
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
404
