人类视觉皮层中的空间注意力的分配,作为内生暗示有效性的函数
William Narhi-Martinez1, Yong Min Choi1, Blaire Dube2
1Department of Psychology, The Ohio State University, Columbus, OH, USA.
概括
这项研究表明,虽然确定性和概率线索最初以类似的方式引导注意力,但确定性线索导致视觉皮层中更强烈,持续的神经活动,特别是在记忆任务期间. 线索的有效性会影响随着时间的推移注意力分配.
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
- 视觉感知 视觉感知 视觉感知
背景情况:
- 视觉皮层包含视网膜的地图.
- 隐藏的注意力调节了在视网膜上绘制的区域的活动.
- 有限的研究比较了不同类型的注意力暗示神经活动.
研究的目的:
- 调查fMRI检测到的视网膜特异性皮质活动如何在确定性和概率空间注意力线索之间不同.
- 检查基于提示有效性的神经资源分配的时间动态.
主要方法:
- 使用功能磁共振成像 (fMRI) 来测量大脑活动.
- 参与者执行了一个用确定性 (100%有效),概率性 (70%有效) 或中立空间线索的记忆任务.
- 将视觉皮层划分为象限特定的感兴趣区域 (qROI),以分析空间注意力分布.
主要成果:
- 确定性和概率线索都在内存阵列前的线索位置产生了可比的初始促进.
- 在记忆阵列开始后,与概率线索相比,在确定性线索中观察到显著更大的神经促进.
- 与确定性线索相关的便利性在探测器中持续存在,与概率线索不同.
结论:
- 线索有效性通过不同调节神经资源的分配在线索和非线索位置随着时间的推移.
- 注意分配不一定与提示有效性直接扩展.
- 研究结果强调了暗示类型,视觉处理和注意力控制之间的动态相互作用.
更多相关视频
13:00Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
Published on: January 23, 2017
9.8K
08:45Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
Published on: October 24, 2012
14.6K
相关概念视频
Depth 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
Association 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
Motor and Sensory Areas of the Cortex
2.8K
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor...
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor...
2.8K
