相关实验视频
Updated: Jul 15, 2025

12:33
Corticospinal Excitability Modulation During Action Observation
Published on: December 31, 2013
8.9K
在肌肉缩侧面硬化症中,在自愿指部运动期间,有感觉皮层过度兴奋的感觉门在肌肉缩侧面硬化症
Toshio Shimizu1, Yuki Nakayama2, Kota Bokuda1
1Department of Neurology, Tokyo Metropolitan Neurological Hospital, Tokyo 183-0042, Japan.
Brain sciences
|September 28, 2023
概括
肌缩侧面硬化症 (ALS) 患者表现出增强的皮质反应. 这项研究发现,在早期的ALS中,感官门被保留,这表明过度活跃性源于皮质过度兴奋,而不是受损的抑制.
科学领域:
- 神经科学是一个神经科学.
- 神经学 神经学
- 临床电生理学 临床电生理学
背景情况:
- 皮质对体感唤起潜能 (SEP) 的皮质反应在肌缩侧面硬化症 (ALS) 患者中升高.
- 感官门在ALS感官皮质过活性的病理生理学中的作用尚不清楚.
研究的目的:
- 调查感官门是否参与ALS患者感官皮质过活性的病理生理学.
- 分析SEP组件 (N20,P25,N30) 在休息状态和在ALS患者和对照者的自愿运动期间.
主要方法:
- 在14名ALS患者和13名健康对照中记录了中枢神经SEP.
- 通过测量SEP组件幅度变化在自愿的手指运动中评估感觉门.
- 分析了顶部N20,P25和前部N30组成部分.
主要成果:
- 与对照组相比,ALS患者的SEP组件幅度 (N20发病峰值,N20峰值-P25峰值,N30发病峰值) 在ALS患者中显著更高.
- 在ALS患者和对照人群之间,没有观察到SEP振幅减小比率 (隔离) 的显著差异.
- 在ALS患者的基线SEP幅度和门口比率之间存在相关性.
结论:
- 主要感官皮质和次要运动皮质的刺激性在ALS中得到增强.
- 感觉门机制似乎在ALS的早期阶段得到了保存.
- 在ALS中增强的SEP归因于皮质过度兴奋,而不是运动期间抑制机制受损.
相关概念视频
Somatosensation
36.7K
The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
36.7K
Motor and Sensory Areas of the Cortex
4.0K
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....
4.0K
Somatosensory, Motor, and Association Cortex
539
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...
539
Overview of Somatic Sensory Pathways
4.6K
Somatic sensory or somatosensory pathways refer to the neural pathways that carry information related to touch, pressure, pain, temperature, and proprioception from the skin, muscles, tendons, and joints to the brain. These pathways involve several stages of processing and integration of sensory information.
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
4.6K
Major Somatic Sensory Pathways
1.0K
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...
1.0K

