默认,控制和注意网络中的概念表示是取决于任务和跨模式的
Philipp Kuhnke1, Markus Kiefer2, Gesa Hartwigsen1
1Wilhelm Wundt Institute for Psychology, Leipzig University, Germany; Lise Meitner Research Group Cognition and Plasticity, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany.
Brain and language
|August 18, 2023
概括
人类大脑的概念知识处理是灵活的,并且依赖于任务. 神经成像揭示了多模式大脑区域的概念表征是跨模式的,涉及多个大规模的大脑网络.
科学领域:
- 认知神经科学 认知神经科学
- 神经成像是一种神经成像.
- 大脑功能 大脑功能
背景情况:
- 概念知识是人类认知的基础.
- 神经成像研究表明,概念处理涉及特定模式和多模式的大脑区域,受任务需求的影响.
- 在理解概念特征的任务调制,多式区域的交叉模式以及概念系统与大脑网络的关系方面存在差距.
研究的目的:
- 调查概念特征表示在多大程度上受到任务的调制.
- 确定多模式大脑区域中的概念表征是否是跨模式的.
- 阐明概念系统与大规模功能性大脑网络之间的关系.
主要方法:
- 多变量模式分析 (MVPA) 应用于功能磁共振成像 (fMRI) 数据.
- 利用了40名参与者的数据,他们执行了三个不同的任务:词汇决策,健全判断和对书面文字的行动判断.
- 检查了大脑活动模式,以解码概念表示.
主要成果:
- 概念特征的表现受到执行的特定任务的显著调节.
- 有证据表明,在多个多模式大脑区域内的概念表征表现出跨模式特征.
- 概念性特征检索涉及默认模式网络,前面对面控制网络和背侧注意力网络.
结论:
- 概念表征受到任务需求的强烈影响,突出了认知灵活性.
- 多模式大脑区域支持跨模式的概念表征.
- 概念系统以任务依赖和跨模式的方式与大规模的大脑网络进行交互,支持灵活的概念处理理论.
相关概念视频
High-Level and Low-Level Awareness
292
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...
292
Motor and Sensory Areas of the Cortex
4.0K
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 cortex....
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 cortex....
4.0K
Somatosensory, Motor, and Association Cortex
551
The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
551
Association Areas of the Cortex
5.5K
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,...
5.5K


