皮质神经假体介导的功能性ipsilateral控制运动在老鼠脊髓半截裂的运动
Elena Massai1, Marco Bonizzato1,2, Isley De Jesus1,2
1Département de Neurosciences, Groupe de recherche sur la Signalisation Neurale etla Circuiterie (SNC) and Centre Interdisciplinaire de Recherche sur le Cerveau etl'Apprentissage (CIRCA), Université de Montréal, Montréal, Canada.
eLife
|November 25, 2024
概括
在脊髓损伤 (SCI) 的老鼠中刺激皮质运动皮质促进了双边四肢运动,并缓解了运动缺陷. 这表明,在SCI之后,皮层网络在运动控制中起着关键作用.
科学领域:
- 神经科学是一个神经科学.
- 发动机控制器的控制器
- 脊髓损伤研究 脊髓损伤研究
背景情况:
- 随意的肢体运动主要与对侧运动皮质有关.
- 新出现的证据表明,皮层的双侧网络,特别是在双边协调任务,如移动.
- 脊髓损伤 (SCI) 往往导致显著的运动障碍.
研究的目的:
- 为了研究异侧运动皮质在单侧胸部SCI后的老鼠运动中的功能性作用.
- 探索皮质神经假肢在恢复双侧运动控制方面的潜力.
- 了解如何ipsilesional皮质激活影响通过节省路径的运动.
主要方法:
- 单侧胸部脊髓损伤 (SCI) 在老鼠.
- 应用一种皮质神经修复方法,包括刺激皮质运动皮质.
- 运动动力和姿势缺陷的评估.
- 切除同类运动皮质以确认发现.
主要成果:
- 在所有SCI大鼠中,对ipsilesional运动皮层的刺激诱导了双边协同作用 (对侧脚升高和ipsilateral后肢延伸).
- 在某些动物中,后肢运动皮层的一个子区域调节了后肢曲.
- 阴性皮层刺激立即改善了运动运动和姿势缺陷,在同源皮层切除后,效果仍然存在.
结论:
- 提供了强有力的证据表明,SCI后的ipsilesional皮层激活和精确的ipsilateral后肢运动控制之间存在因果关系.
- 突出了皮层网络在SCI后的运动恢复和功能中发挥的重要作用.
- 表明了针对SCI康复的ipsilateral途径的新型神经假肢策略的潜力.
相关概念视频
Brainstem
7.5K
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...
7.5K
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
Indirect Motor Pathways
3.4K
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...
3.4K


