解码视觉空间注意力控制的解码
Sreenivasan Meyyappan1,2, Abhijit Rajan2, Qiang Yang2
1Center for Mind and Brain, University of California, Davis, California 95618.
eNeuro
|February 13, 2025
概括
上下注意力信号会影响视觉皮层所有层面的视觉处理. 多变量模式分析显示,较低水平的视觉区域更好地预测性能,挑战视觉空间注意力的传统模型.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 视觉感知 视觉感知 视觉感知
背景情况:
- 视觉空间注意力的模型提出从背部注意网络的自上而下的控制信号调节视觉皮层活动.
- 这些自上而下的影响在视觉等级层面的分布及其对绩效的影响仍在争论中.
研究的目的:
- 调查与注意力相关的基线活动在视觉层次结构中的分布.
- 为了确定神经活动的变化是否与改善的行为表现相关.
- 为了比较单变量和多变量分析方法的结果.
主要方法:
- 在自愿空间注意力任务中分析了两个独立的功能磁共振成像 (fMRI) 数据集.
- 应用单变量分析来评估基线神经活动的变化.
- 利用多变量模式分析 (MVPA) 来解码视觉区域的注意力条件.
主要成果:
- 单变量分析显示,高阶视觉区域的活性增强,低阶视觉区域的影响较弱.
- MVPA显示了所有视觉区域的显著注意力解码,在下级区域的精度更高.
- 解码精度,而不是单变量激活大小,预测了刺激歧视性能.
- 在外部指导和自我节奏的注意条件中,MVPA的结果是一致的.
结论:
- 上下注意力偏差延伸到整个视觉层次结构,在下级区域有显著的代表性.
- 多变量模式分析提供了比单变量分析更敏感的注意力调制量.
- 在较低级视觉区域的注意调节对于将感官处理转化为行为表现至关重要.
更多相关视频
07:12Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
Published on: April 11, 2025
281
13:00Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
Published on: January 23, 2017
9.8K
相关概念视频
01:15Depth Perception and Spatial Vision
523
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
523
01:24Vision
52.9K
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.
52.9K
01:26Visual System
483
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...
483
01:21Association Areas of the Cortex
4.9K
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
4.9K