转移稳定的动力学源于在休息状态下皮质的局部刺激抑制恒常状态
Francisco Páscoa Dos Santos1,2, Paul F M J Verschure3
1Eodyne Systems SL, Barcelona, Spain.
Network neuroscience (Cambridge, Mass.)
|October 24, 2025
概括
人类皮质 - 人类皮质.
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.
背景情况:
- 皮层动态表现出超稳定性,这对于探索网络状态至关重要.
- 这种转移稳定性依赖于由激发性-抑制性 (E-I) 稳定性控制的电路级动态.
- 对于E-I恒温机制对皮质转移稳定性的具体贡献尚不清楚.
研究的目的:
- 研究个体激发-抑制 (E-I) 恒常机制如何独特地促进人类皮质中静止状态动态的出现.
- 测试假设,多个E-I稳态机制对于复制实证皮质连接和动态至关重要.
主要方法:
- 开发和分析人类大脑皮层的大规模计算模型.
- 模拟各种E-I恒温机制及其对网络动态的影响.
- 对实证连接性,元稳定性和功能复杂性的模型再现的评估.
主要成果:
- 只有当多个E-I恒温机制被纳入模型时,才会复制实证皮层动力学.
- 兴奋和抑制的恒常性提高了转移稳定性,而内在兴奋性调节确保了适度的同步,以达到最大的功能复杂性.
- E-I平衡调节连接器枢纽中的分叉动态,补偿输入波动,特别是在模拟局部马振荡时.
结论:
- 皮层网络通过多因素的E-I平衡恒常性实现自我组织,以达到最大的转移稳定性.
- 多种恒温机制提供了超越电路层面的好处,支持大规模的转移稳定的皮质网络动态.
- 在人类大脑皮层中,E-I平衡,马节奏和转移稳定的动态之间存在联系.
相关概念视频
01:15Resting Potential Decay
6.1K
The resting membrane potential of a neuron (-70mV) is sustained due to the selective ion permeability of the membrane. At the resting potential, the membrane is slightly permeable to ions like sodium (Na+) and chloride (Cl−) and highly permeable to potassium ions (K+). Differences in the ions' concentration inside the cell compared to the outside are maintained by membrane transport proteins like channels and pumps.
At rest, the K+ is the main ion that moves across the membrane...
At rest, the K+ is the main ion that moves across the membrane...
6.1K
01:16Non-equilibrium in the Cell
5.3K
An important concept in studying metabolism and energy is that of chemical equilibrium. Most chemical reactions are reversible. They can proceed in both directions, releasing energy into their environment in one direction, and absorbing it from the environment in the other direction. The same is true for the chemical reactions involved in cell metabolism, such as the breaking down and building up of proteins into and from individual amino acids, respectively. Reactants within a closed system...
5.3K
01:30Ligand-Gated Ion Channel Receptor: Gating Mechanism
3.8K
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
3.8K
01:27Feedback Regulation of Calcium Concentration
3.9K
Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
3.9K
01:19The Role of Ion Channels in Neuronal Computation
3.6K
A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential....
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential....
3.6K
01:16Cell Motility through Blebbing
2.4K
Blebs are a type of membrane protrusion formed by the internal hydrostatic pressure of the cytoplasm. Blebs are observed in several cell types, including fibroblasts, immune cells, and single-celled organisms like the amoeba. The primary function of blebs is cell locomotion and apoptosis, but they are also found during necrosis and cell division. The life cycle of a bleb comprises an initiation phase followed by the expansion and retraction phases.
Blebbing Through the Matrix
In multicellular...
Blebbing Through the Matrix
In multicellular...
2.4K