室内脊髓内微刺激改变了大鼠的神经群体水平的感知活动,包括脊髓损伤后的脊髓损伤
Jacob Graves McPherson1,2,3,4,5, Maria F Bandres1,5
1Program in Physical Therapy, Washington University School of Medicine, St. Louis, MO, USA.
Pain reports
|December 26, 2025
概括
在脊髓损伤 (SCI) 后的脊髓内微刺激 (ISMS) 可能会改变脊髓对疼痛的反应. 这项对老鼠的研究表明,ISMS可以增加感官活动的传播,可能增强疼痛控制.
科学领域:
- 神经科学是一个神经科学.
- 脊髓损伤研究 脊髓损伤研究
- 疼痛管理 疼痛管理
背景情况:
- 脊髓损伤 (SCI) 经常导致运动缺陷和神经病痛.
- 了解脊髓如何处理SCI后的感觉信息,对于开发有效的治疗方法至关重要.
研究的目的:
- 调查用于改善SCI后运动的脊髓内微刺激 (ISMS) 是否会影响脊髓对疼痛信号的反应.
- 为了确定ISMS对神经群体活动的影响,以响应可感知输入.
主要方法:
- 该研究使用了三组老鼠模型:健康,没有疼痛的SCI和有疼痛的SCI.
- 在低频ISMS之前,期间和之后,使用脚捏,模拟了nociceptive输入.
- 通过使用微电极阵列,在L5脊柱段记录神经活动.
主要成果:
- 在ISMS之前,两组SCI都显示出比健康老鼠更多的疼痛反应电极.
- ISMS调节神经活动,SCI组显示出更多的刺激反应.
- 在ISMS之后,所有组都表现出改变疼痛反应的显著增加,在非受伤组中,抑制更为突出.
结论:
- 伊斯姆斯似乎增加了感官活动的空间传播,可能导致脊髓反应的持久变化.
- 在一个队列中观察到的抑制作用表明,ISMS可能提供一种机制,用于广泛抑制SCI后疼痛信号的控制.
相关概念视频
01:15Neurogenesis and Regeneration of Nervous Tissue
In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...
01:25Secondary Spinal Cord Injury llI: Pathophysiology
Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...