非局部合的Hindmarsh-Rose神经元的集体动力学被磁流改变了
L Messee Goulefack1,2, Marlon F Ramos3, R Yamapi1
1Fundamental Physics Laboratory, Department of Physics, Faculty of Science, University of Douala, Box 24, 157 Douala, Cameroon.
Chaos (Woodbury, N.Y.)
|August 7, 2023
概括
这项研究探讨了磁流和合强度如何影响Hindmarsh-Rose神经元网络. 增加这些参数通常会提高连贯性,改变发射模式,影响网络动态.
科学领域:
- 计算神经科学是一种神经科学.
- 复杂的系统复杂的系统.
- 非线性动力学是一种非线性动力学.
背景情况:
- 欣德马什-罗斯神经元是研究神经元发射模式的一个模型.
- 非局部合引入神经网络中的复杂相互作用.
- 磁流感应可以改变神经元刺激性.
研究的目的:
- 为了研究磁流 (通过二次记忆器) 和非局部合强度对Hindmarsh-Rose神经元网络动态的影响.
- 分析memristor强度 (k) 和合强度 (σ) 的变化如何影响集体行为,连贯性和发射模式.
- 探索互动范围对网络动态的影响.
主要方法:
- 模拟非局部合的Hindmarsh-Rose神经元与磁流感应.
- 使用强度为k的二进制memristor修改膜电位.
- 实现强度为 σ 的非局部合和不同的相互作用半径.
- 分析连贯性,爆发频率,峰值特征和静止期的变化.
主要成果:
- 增加memristor强度 (k) 和合强度 (σ) 一般会增加网络的一致性.
- 在特定的参数范围内观察到偏离增强的连贯性.
- 较高的k值会导致爆发频率增加,峰值数/振幅减少,静止时间更长.
- 相互作用范围的变化 (邻近all-to-all) 显示了质量上类似的诱导影响.
结论:
- 磁流感应和非局部合是调节神经元网络动态的重要因素.
- 记忆器强度和合强度之间的相互作用提供了一种控制网络连贯性和点火模式的手段.
- 这些发现有助于理解神经系统中复杂的集体行为.
相关概念视频
01:18Magnetic Flux
3.6K
The magnetic flux measures the number of magnetic field lines passing through a given surface area. The SI unit for magnetic flux is the weber (Wb). Magnetic flux is a scalar quantity. It depends on three factors: the strength of the magnetic field B, the area through which the field lines pass, and the relative orientation of the field with the surface area.
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...
3.6K
01:23Magnetic Field due to Moving Charges
8.8K
A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
8.8K
01:18Magnetic Field Due to Two Straight Wires
2.6K
Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
2.6K
01:13Torque On A Current Loop In A Magnetic Field
4.2K
The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
4.2K
01:15Magnetic Vector Potential
688
In electrostatics, the electric field can be written as the negative gradient of the potential. In magnetostatics, the zero divergence of the magnetic field ensures that the magnetic field can be expressed as the curl of a vector potential. This potential is known as the magnetic vector potential.
Consider an ideal solenoid with n turns per unit length and radius R. If I is the current through the solenoid, the magnetic field inside the solenoid is expressed as the product of vacuum...
Consider an ideal solenoid with n turns per unit length and radius R. If I is the current through the solenoid, the magnetic field inside the solenoid is expressed as the product of vacuum...
688
01:23Propagation of Action Potentials
5.9K
The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
5.9K