神经网络模型中的关键性的一般描述
Longbin Zeng1, Jianfeng Feng1,2, Wenlian Lu3
1Institute of Science and Technology for Brain-Inspired Intelligence, Fudan University, Shanghai, China.
Heliyon
|April 2, 2024
概括
这项研究揭示了近临界度的神经网络如何表现出规模不变的神经雪崩. 我们确定了同步爆发和耐噪声关键动态的关键机制,有助于大脑动态建模.
科学领域:
- 计算神经科学是一种神经科学.
- 系统神经科学 系统神经科学
- 理论神经科学 理论神经科学
背景情况:
- 实验数据表明,大脑皮层运行接近关键性,一个状态的特点是秩序和混乱的混合.
- 我们仍然需要全面了解关键性是如何出现的,以及如何在神经网络中复制它.
研究的目的:
- 研究结合的神经网络中关键性的出现和特征.
- 确定负责同步爆发和规模不变神经元雪崩的机制.
- 探索噪声在关键动态中的作用,并验证跟踪网络连接的方法.
主要方法:
- 基于导电性的神经元的模拟合网络.
- 分析了神经元发射模式,包括异步不规则 (AI) 和同步规则 (SR) 状态.
- 研究了神经元雪崩的动态及其权力规律的分布.
- 应用集体卡尔曼波器来估计有效的网络连接.
主要成果:
- 证明了不同的尖峰模式和规模不变的神经系统雪崩 (关键性) 的共存.
- 表明快速的突触合可以在平均占主导地位的制度中诱导雪崩.
- 确定了有助于同步爆发的三个阶段:平均主导动力学,快速尖端启动和抑制性取消.
- 通过在Hopf分叉附近的随机交叉解释了噪声中的临界雪崩.
- 验证了集成卡尔曼过器,用于使用合成BOLD信号跟踪关键网络活动.
结论:
- 神经网络可以表现出关键性,其特点是神经系统的雪崩和特定的发射模式.
- 低于值的动态,峰值启动和抑制的相互作用形成了同步爆发.
- 在杂的条件下,临界雪崩可以通过近分叉的随机过程来理解.
- 整体卡尔曼波器是分析关键大脑动态中的有效连接的可行工具.
相关概念视频
Neural Circuits
1.2K
Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
1.2K
The Role of Ion Channels in Neuronal Computation
3.2K
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....
3.2K
Neuroplasticity
344
Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
344
Neuronal Communication
872
Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
872
Neurons as Communicators of the Brain
1.2K
Neurons, the fundamental units of the brain and nervous system, function as the primary transmitters of information throughout the body. Their ability to communicate through electrical and chemical signals is vital for every bodily function, from regulating the heartbeat to processing complex thoughts. Each neuron has three main components: the cell body (soma), dendrites, and an axon, each specialized to facilitate swift and efficient neural communication.
Cell Body
The cell body, also known...
Cell Body
The cell body, also known...
1.2K
Neural Regulation
39.4K
Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
39.4K


