皮层反循环连接工作内存的分布式表示
Ivan Voitov1,2, Thomas D Mrsic-Flogel3
1Sainsbury Wellcome Centre, University College London, London, UK. i.voitov@ucl.ac.uk.
Nature
|July 27, 2022
概括
新皮质中的神经回路维持视觉工作记忆. 在相互连接的皮质区域,特别是视觉区域AM和前运动区域M2的高维活动对于这种认知功能至关重要.
科学领域:
- 神经科学
- 认知科学
背景情况:
- 工作记忆对于灵活的行为至关重要,但它的神经表达和维护机制尚未完全理解.
- 之前的研究观察到不同大脑区域的工作记忆相关活动,但精确的神经群体表现仍然难以捉摸.
研究的目的:
- 研究小鼠视觉工作记忆的神经实现.
- 确定特定的大脑区域和参与维护工作记忆表现的人群活动动态.
主要方法:
- 小鼠执行了一个延迟的非匹配样本任务 (需要工作记忆) 和一个区分任务 (不需要工作记忆).
- 使用过渡性光遗传性失活来选择性地破坏特定皮质区域的神经活动.
- 在任务执行期间记录和分析人口活动,以确定工作记忆的神经相关性.
主要成果:
- 包括视觉区域AM和前运动区域M2在内的分布式新皮层区域被选择性地要求维护工作记忆.
- 在高维人口活动中发现了工作记忆表示,与在延迟期间观察到的低维动态不同.
- 在工作记忆中关键的 AM 或 M2 间断通信的失活.
结论:
- 相互连接的皮质区域保持对视觉工作记忆至关重要的高维表示.
- 这些发现突出了分布式皮质网络及其在支持工作记忆等认知功能的作用.
相关概念视频
Working Memory
423
Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this...
423
Somatosensory, Motor, and Association Cortex
888
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...
888
Motor and Sensory Areas of the Cortex
4.5K
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....
4.5K
Neural Circuits
1.5K
Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
1.5K
Association Areas of the Cortex
6.1K
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,...
6.1K
Storage
128
A schema is a mental framework that helps individuals organize and interpret information. Schemata, formed from previous experiences, influence how we process new information: how we encode it, the inferences we make, and how we retrieve it. For instance, a schema for what a typical classroom looks like might include desks, a teacher's desk, a whiteboard, and students in such an environment. This expectation helps us quickly understand and navigate new classrooms without needing to analyze...
128


