重复的横磁刺激 (rTMS) 触发了循环神经网络中的剂量依赖的恒常性重新连接
Swathi Anil1,2,3, Han Lu1,4, Stefan Rotter2,3,4
1Department of Neuroanatomy, Institute of Anatomy and Cell Biology, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
PLoS computational biology
|November 13, 2023
概括
计算机建模揭示了重复性跨磁刺激 (rTMS) 可以通过恒常性结构可塑性诱导持久的大脑变化. 网络抑制在优化rTMS协议以有效刺激大脑方面发挥着关键作用.
科学领域:
- 神经科学是一个神经科学.
- 计算神经科学是一种神经科学.
- 生物物理学的生物物理.
背景情况:
- 重复性横磁刺激 (rTMS) 是一种非侵入性脑刺激技术.
- 设计有效的rTMS协议是具有挑战性的,因为长期影响的难以捉摸的生物机制.
- 目前的协议通常依赖于突触可塑性模型.
研究的目的:
- 通过计算建模,探索rTMS对长期结构可塑性的影响.
- 调查由rTMS引起的网络连接变化.
- 确定影响RTMS结果的关键参数.
主要方法:
- 在激发性神经元中模拟了一个具有恒常结构可塑性的循环神经网络.
- 研究了刺激参数 (频率,强度,持续时间) 对网络可塑性的影响.
- 分析了反抑制在调节rTMS效应中的作用.
主要成果:
- 恒温结构可塑性机制对rTMS协议参数敏感.
- 网络反抑制影响净刺激结果.
- 抑制性网络可以阻碍RTMS诱导的结构重组.
结论:
- 建议rTMS诱导的恒常性结构可塑性作为持久效应的新机制.
- 强调网络抑制在rTMS协议设计中的关键作用.
- 强调需要对刺激方案进行标准化和优化.
相关概念视频
01:35Long-term Potentiation
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
01:25Long-term Potentiation
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
LTP can occur when presynaptic neurons...
Hebbian LTP
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