大脑干中的异常活动会影响神经肌肉骨模型中的步态
Daisuke Ichimura1, Makoto Sawada2, Kenji Wada3
1Artificial Intelligence Research Center, National Institute of Advanced Industrial Science and Technology, Tokyo, Japan. d.ichimura@aist.go.jp.
Journal of neuroengineering and rehabilitation
|April 4, 2025
概括
研究人员模拟了哺乳动物的运动模式,以了解神经系统疾病中步态的结. 调节脑干核活动,特别是形核和形核,复制了步态亚型的结,提供了对其机制的见解.
科学领域:
- 神经科学是一个神经科学.
- 生物力学 生物力学
- 计算建模计算建模
背景情况:
- 哺乳动物的运动对于生存至关重要,由脊髓中央模式发生器控制,由中脑运动区域调节.
- 中脑的运动运动区域包括形细胞核 (PPN) 和形细胞核 (CnF),它们在运动中发挥着不同的作用.
- 像帕金森病这样的神经系统疾病会影响运动,导致步态结 (FOG),这种现象的机制尚不清楚.
研究的目的:
- 阐明结步态 (FOG) 背后的机制.
- 为了研究形核 (PPN) 和形核 (CnF) 在FOG中所扮演的角色.
- 开发和使用神经肌肉骨模型来模拟FOG事件.
主要方法:
- 开发了一个二维的神经肌肉骨模型,包括7个环节,18个肌肉和脑干-脊髓神经系统.
- 创建了一个正常的运动模型,然后通过改变PPN和CnF参数来修改以模拟异常的大脑干活动.
- 基因算法和FOG识别算法用于模型优化和事件检测.
主要成果:
- 正常模型成功模拟了行走.
- 在异常模型中,在4万个参数集中,发现了156个步态结事件.
- 层次集群分析揭示了与PPN和CnF活动相关的四个不同的参数集群,与临床FOG亚型相关联.
结论:
- 脚核 (PPN) 和形核 (CnF) 的活动与步态结 (FOG) 有关.
- PPN和CnF活动的差异调节可以产生观察到的FOG亚型.
- 开发的模型为FOG病理生理学提供了洞察力,并有助于对FOG亚型进行分类.
相关概念视频
01:22Indirect Motor Pathways
1.4K
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...
1.4K
01:19Brainstem
1.5K
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...
1.5K
01:28Major Somatic Sensory Pathways
760
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...
760