在灵长类的小脑结节和膜中对自我运动的基本真实编码
Robyn L Mildren1, Kathleen E Cullen2
1Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Baltimore, USA. Kathleen.Cullen@jhu.edu.
Nature communications
|February 25, 2026
概括
小脑结节和 (NU) 不像预测的那样抑制自我运动信号. 相反,这些大脑区域准确地跟踪头部运动,无论它们是自生成的还是被动的,支持稳定的导航.
科学领域:
- 神经科学是一个神经科学.
- 大脑小叶的功能
- 垂体系统 垂体系统 垂体系统
背景情况:
- 准确的自我运动感知对于凝视稳定,姿势控制和导航至关重要.
- 据推测,小脑结节和膜 (NU) 使用内部模型来过自我生成的运动.
- 这种内部模型假设缺乏直接的实验验证.
研究的目的:
- 使用内部模型,直接测试小脑结节和膜 (NU) 抑制自我生成运动的假设.
- 研究NU普尔金耶细胞如何编码主动与被动头部运动.
- 为了确定效能复制信号是否集成到NU活动中.
主要方法:
- 在 rhesus 子的NU中记录了Purkinje 细胞活动.
- 在主动和被动的头部转换和倾斜过程中测量的神经反应.
- 评估对外部干扰的反应以及在被阻止的活跃运动期间的反应.
主要成果:
- 努神经元同样编码了被动和自我生成的头部运动,反映了无论来源如何的净运动.
- 尽管存在外部干扰,神经敏感性仍然保持不变,这表明基本真相编码.
- 当活跃运动被阻止时,普尔金尼细胞活动没有改变,没有表现出效能复制集成;神经元在活跃倾斜时编码了动态运动和静态方向.
结论:
- 这些发现挑战了NU中自动运动处理的主流内部模型假设.
- 简单地说,NU的功能是作为自动运动的文本不变估计器,提供基本真相信息.
- 这种强大的编码支持在复杂,动态的环境中稳定的运动行为.
相关概念视频
Brainstem
7.2K
The brainstem, located inferior to the brain and superior to the spinal cord, serves as a bridge between the cerebrum and the spinal cord. It plays a vital role in relaying information and controlling critical life functions. It comprises three primary regions: the midbrain, pons, and medulla oblongata.
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...
7.2K
Major Somatic Sensory Pathways
3.2K
Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the...
3.2K
Diencephalon: Thalamus and Information Relay
5.0K
The thalamus, often called “the gateway to the cerebral cortex,” is vital in processing and directing sensory and motor signals throughout the brain. Almost all inputs destined for the cerebral cortex, except for olfactory signals, are relayed through the thalamus. The thalamus is a sophisticated relay station, channeling information from various brain regions to the cerebral cortex, as well as a filter, prioritizing certain signals over others based on current physiological...
5.0K
The Vestibular System
44.4K
The vestibular system is a set of inner ear structures that provide a sense of balance and spatial orientation. This system is comprised of structures within the labyrinth of the inner ear, including the cochlea and two otolith organs—the utricle and saccule. The labyrinth also contains three semicircular canals—superior, posterior, and horizontal—that are oriented on different planes.
44.4K
Indirect Motor Pathways
3.7K
The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...
3.7K
Equilibrium and Balance
7.0K
The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
7.0K


