在人体后壁皮层和运动皮层中对行动的层次和上下文依赖编码
V Bougou1, J Gamez1, E R Rosario2
1Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA.
bioRxiv : the preprint server for biology
|November 26, 2025
概括
顶顶叶片 (SPL),不仅仅是运动皮质 (MC),灵活地处理观察到的行动以理解. 这个大脑区域显示了依赖上下文的行动表征,这对于将视觉与运动目标联系起来至关重要.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 发动机控制器的控制器
背景情况:
- 行动理解依赖于内部模型,将视觉输入与运动意图联系起来.
- 虽然子中的镜像神经元在动作观察期间显示运动共振,但人类的证据有限.
- 运动共振与人类行为理解中的其他机制之间的作用仍在争论中.
研究的目的:
- 研究人类运动皮质 (MC) 和上顶叶 (SPL) 中预期和观察到的手动行为的神经表现.
- 为了确定人类行动的理解是否仅仅依赖于运动共振或涉及其他神经计算.
- 探索像MC和SPL这样的大脑区域如何区分意图和观察,以及背景如何影响这些表示.
主要方法:
- 在两个四肢的参与者中使用犹他阵列记录了MC和SPL的神经活动.
- 参与者预期和观察到的手动,包括与指示和观察到的行动不一致的条件.
- 分析单个单位和人口水平的活动,以确定意图和观察的神经编码.
主要成果:
- 运动皮层 (MC) 强烈编码了预期的行为,但显示了有限的,人口层面的重叠与观察到的行为.
- 上顶叶 (SPL) 表明,在单个单元和群体层面上,既有预期和观察到的动作都有共同的神经表征.
- SPL表现出观察到的行动的上下文依赖编码,根据行为相关性将它们关闭,与意图主导的MC不同.
结论:
- 通过灵活地将观察到的行动与内部目标联系起来,SPL在行动理解中发挥着至关重要的作用.
- 建议进行层次组织,MC维护意图特定的代码,SPL整合目标导向行为的感官信息.
- 这些发现揭示了SPL的上下文依赖性关门机制,这对于灵活行动的理解至关重要.
相关概念视频
01:23Somatosensory, Motor, and Association Cortex
2.2K
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...
2.2K
01:14Motor and Sensory Areas of the Cortex
6.8K
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 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....
6.8K
01:18Hierarchy of Motor Control
5.9K
The hierarchy of motor control refers to the different levels of organization and processing involved in controlling movement in the body. These levels range from higher cortical areas involved in planning and decision-making to lower spinal cord reflexes that respond automatically to external stimuli.
5.9K
01:21Association Areas of the Cortex
8.7K
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,...
8.7K
01:22Lobes of the Cerebrum
4.0K
The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements....
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements....
4.0K
01:05Cerebral Hemispheres
2.0K
The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
2.0K